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195 vulnerabilities found for envoy by envoyproxy

CVE-2026-26311 (GCVE-0-2026-26311)

Vulnerability from nvd – Published: 2026-03-10 19:14 – Updated: 2026-03-10 19:34
VLAI
Title
Envoy HTTP: filter chain execution on reset streams causing UAF crash
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, a logic vulnerability in Envoy's HTTP connection manager (FilterManager) that allows for Zombie Stream Filter Execution. This issue creates a "Use-After-Free" (UAF) or state-corruption window where filter callbacks are invoked on an HTTP stream that has already been logically reset and cleaned up. The vulnerability resides in source/common/http/filter_manager.cc within the FilterManager::decodeData method. The ActiveStream object remains valid in memory during the deferred deletion window. If a DATA frame arrives on this stream immediately after the reset (e.g., in the same packet processing cycle), the HTTP/2 codec invokes ActiveStream::decodeData, which cascades to FilterManager::decodeData. FilterManager::decodeData fails to check the saw_downstream_reset_ flag. It iterates over the decoder_filters_ list and invokes decodeData() on filters that have already received onDestroy(). This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26310 (GCVE-0-2026-26310)

Vulnerability from nvd – Published: 2026-03-10 19:08 – Updated: 2026-03-10 20:12
VLAI
Title
Crash for scoped ip address in Envoy during DNS
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26330 (GCVE-0-2026-26330)

Vulnerability from nvd – Published: 2026-03-10 19:19 – Updated: 2026-03-10 20:17
VLAI
Title
Envoy global rate limit may crash when the response phase limit is enabled and the response phase request is failed directly
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, At the rate limit filter, if the response phase limit with apply_on_stream_done in the rate limit configuration is enabled and the response phase limit request fails directly, it may crash Envoy. When both the request phase limit and response phase limit are enabled, the safe gRPC client instance will be re-used for both the request phase request and response phase request. But after the request phase request is done, the inner state of the request phase limit request in gRPC client is not cleaned up. When a second limit request is sent at response phase, and the second limit request fails directly, the previous request's inner state may be accessed and result in crash. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26308 (GCVE-0-2026-26308)

Vulnerability from nvd – Published: 2026-03-10 19:01 – Updated: 2026-03-10 20:12
VLAI
Title
Envoy has an RBAC Header Validation Bypass via Multi-Value Header Concatenation
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, the Envoy RBAC (Role-Based Access Control) filter contains a logic vulnerability in how it validates HTTP headers when multiple values are present for the same header name. Instead of validating each header value individually, Envoy concatenates all values into a single comma-separated string. This behavior allows attackers to bypass RBAC policies—specifically "Deny" rules—by sending duplicate headers, effectively obscuring the malicious value from exact-match mechanisms. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26309 (GCVE-0-2026-26309)

Vulnerability from nvd – Published: 2026-03-10 19:04 – Updated: 2026-03-10 20:12
VLAI
Title
Envoy has an off-by-one write in JsonEscaper::escapeString()
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, an off-by-one write in Envoy::JsonEscaper::escapeString() can corrupt std::string null-termination, causing undefined behavior and potentially leading to crashes or out-of-bounds reads when the resulting string is later treated as a C-string. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2025-66220 (GCVE-0-2025-66220)

Vulnerability from nvd – Published: 2025-12-03 18:31 – Updated: 2025-12-03 19:10
VLAI
Title
Envoy’s TLS certificate matcher for `match_typed_subject_alt_names` may incorrectly treat certificates containing an embedded null byte
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\0) inside an OTHERNAME SAN value as valid matches.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-170 - Improper Null Termination
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6
Affected: >= 1.34.0, <= 1.34.10
Affected: <= 1.33.12
Create a notification for this product.
Show details on NVD website

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CVE-2025-64763 (GCVE-0-2025-64763)

Vulnerability from nvd – Published: 2025-12-03 18:13 – Updated: 2025-12-03 20:02
VLAI
Title
Envoy forwards early CONNECT data in TCP proxy mode
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, when Envoy is configured in TCP proxy mode to handle CONNECT requests, it accepts client data before issuing a 2xx response and forwards that data to the upstream TCP connection. If a forwarding proxy upstream from Envoy then responds with a non-2xx status, this can cause a de-synchronized CONNECT tunnel state. By default Envoy continues to allow early CONNECT data to avoid disrupting existing deployments. The envoy.reloadable_features.reject_early_connect_data runtime flag can be set to reject CONNECT requests that send data before a 2xx response when intermediaries upstream from Envoy may reject establishment of a CONNECT tunnel.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6
Affected: >= 1.34.0, <= 1.34.10
Affected: <= 1.33.12
Create a notification for this product.
Show details on NVD website

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CVE-2025-64527 (GCVE-0-2025-64527)

Vulnerability from nvd – Published: 2025-12-03 18:04 – Updated: 2025-12-03 20:18
VLAI
Title
Envoy crashes when JWT authentication is configured with the remote JWKS fetching
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy crashes when JWT authentication is configured with the remote JWKS fetching, allow_missing_or_failed is enabled, multiple JWT tokens are present in the request headers and the JWKS fetch fails. This is caused by a re-entry bug in the JwksFetcherImpl. When the first token's JWKS fetch fails, onJwksError() callback triggers processing of the second token, which calls fetch() again on the same fetcher object. The original callback's reset() then clears the second fetch's state (receiver_ and request_) which causes a crash when the async HTTP response arrives.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6
Affected: >= 1.34.0, <= 1.34.10
Affected: <= 1.33.12
Create a notification for this product.
Show details on NVD website

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CVE-2025-62504 (GCVE-0-2025-62504)

Vulnerability from nvd – Published: 2025-10-16 21:23 – Updated: 2025-10-17 13:42
VLAI
Title
Envoy Lua filter use-after-free when oversized rewritten response body causes crash
Summary
Envoy is an open source edge and service proxy. Envoy versions earlier than 1.36.2, 1.35.6, 1.34.10, and 1.33.12 contain a use-after-free vulnerability in the Lua filter. When a Lua script executing in the response phase rewrites a response body so that its size exceeds the configured per_connection_buffer_limit_bytes (default 1MB), Envoy generates a local reply whose headers override the original response headers, leaving dangling references and causing a crash. This results in denial of service. Updating to versions 1.36.2, 1.35.6, 1.34.10, or 1.33.12 fixes the issue. Increasing per_connection_buffer_limit_bytes (and for HTTP/2 the initial_stream_window_size) or increasing per_request_buffer_limit_bytes / request_body_buffer_limit can reduce the likelihood of triggering the condition but does not correct the underlying memory safety flaw.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.1
Affected: >= 1.350, <= 1.35.5
Affected: >= 1.34.0, <= 1.34.9
Affected: <= 1.33.11
Create a notification for this product.
Show details on NVD website

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CVE-2025-62409 (GCVE-0-2025-62409)

Vulnerability from nvd – Published: 2025-10-16 17:47 – Updated: 2025-10-16 19:22
VLAI
Title
Envoy allows large requests and responses to cause TCP connection pool crash
Summary
Envoy is a cloud-native, open source edge and service proxy. Prior to 1.36.1, 1.35.5, 1.34.9, and 1.33.10, large requests and responses can potentially trigger TCP connection pool crashes due to flow control management in Envoy. It will happen when the connection is closing but upstream data is still coming, resulting in a buffer watermark callback nullptr reference. The vulnerability impacts TCP proxy and HTTP 1 & 2 mixed use cases based on ALPN. This vulnerability is fixed in 1.36.1, 1.35.5, 1.34.9, and 1.33.10.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, < 1.36.1
Affected: >= 1.35.0, < 1.35.5
Affected: >= 1.34.0, < 1.34.9
Affected: < 1.33.10
Create a notification for this product.
Show details on NVD website

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CVE-2025-55162 (GCVE-0-2025-55162)

Vulnerability from nvd – Published: 2025-09-03 19:51 – Updated: 2025-09-04 14:29
VLAI
Title
Envoy: oAuth2 Filter Signout route will not clear cookies because of missing "secure;" flag
Summary
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In versions below 1.32.10 and 1.33.0 through 1.33.6, 1.34.0 through 1.34.4 and 1.35.0, insufficient Session Expiration in the Envoy OAuth2 filter leads to failed logout operations. When configured with __Secure- or __Host- prefixed cookie names, the filter fails to append the required Secure attribute to the Set-Cookie header during deletion. Modern browsers ignore this invalid request, causing the session cookie to persist. This allows a user to remain logged in after they believe they have logged out, creating a session hijacking risk on shared computers. The current implementation iterates through the configured cookie names to generate deletion headers but does not check for these prefixes. This failure to properly construct the deletion header means the user's session cookies are never removed by the browser, leaving the session active and allowing the next user of the same browser to gain unauthorized access to the original user's account and data. This is fixed in versions 1.32.10, 1.33.7, 1.34.5 and 1.35.1.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-613 - Insufficient Session Expiration
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.35.0, < 1.35.1
Affected: >= 1.34.0, < 1.34.5
Affected: >= 1.33.0, < 1.33.7
Affected: <= 1.32.0, < 1.32.10
Create a notification for this product.
Show details on NVD website

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CVE-2025-54588 (GCVE-0-2025-54588)

Vulnerability from nvd – Published: 2025-09-02 23:39 – Updated: 2025-09-03 20:27
VLAI
Title
Envoy: Race condition in Dynamic Forward Proxy leads to use-after-free and segmentation faults
Summary
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. Versions 1.34.0 through 1.34.4 and 1.35.0 contain a use-after-free (UAF) vulnerability in the DNS cache, causing abnormal process termination. The vulnerability is in Envoy's Dynamic Forward Proxy implementation, occurring when a completion callback for a DNS resolution triggers new DNS resolutions or removes existing pending resolutions. This condition may occur when the following conditions are met: dynamic Forwarding Filter is enabled, the `envoy.reloadable_features.dfp_cluster_resolves_hosts` runtime flag is enabled, and the Host header is modified between the Dynamic Forwarding Filter and Router filters. This issue is resolved in versions 1.34.5 and 1.35.1. To work around this issue, set the envoy.reloadable_features.dfp_cluster_resolves_hosts runtime flag to false.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.34.0, < 1.34.5
Affected: >= 1.35.0, < 1.35.1
Create a notification for this product.
Show details on NVD website

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CVE-2025-46821 (GCVE-0-2025-46821)

Vulnerability from nvd – Published: 2025-05-07 21:24 – Updated: 2025-05-08 14:11
VLAI
Title
Envoy vulnerable to bypass of RBAC uri_template permission
Summary
Envoy is a cloud-native edge/middle/service proxy. Prior to versions 1.34.1, 1.33.3, 1.32.6, and 1.31.8, Envoy's URI template matcher incorrectly excludes the `*` character from a set of valid characters in the URI path. As a result URI path containing the `*` character will not match a URI template expressions. This can result in bypass of RBAC rules when configured using the `uri_template` permissions. This vulnerability is fixed in Envoy versions v1.34.1, v1.33.3, v1.32.6, v1.31.8. As a workaround, configure additional RBAC permissions using `url_path` with `safe_regex` expression.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-186 - Overly Restrictive Regular Expression
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: < 1.31.8
Affected: >= 1.32.0, < 1.32.6
Affected: >= 1.33.0, < 1.33.3
Affected: >= 1.34.0, < 1.34.1
Create a notification for this product.
Show details on NVD website

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CVE-2025-30157 (GCVE-0-2025-30157)

Vulnerability from nvd – Published: 2025-03-21 14:49 – Updated: 2025-03-21 15:15
VLAI
Title
Envoy crashes when HTTP ext_proc processes local replies
Summary
Envoy is a cloud-native high-performance edge/middle/service proxy. Prior to 1.33.1, 1.32.4, 1.31.6, and 1.30.10, Envoy's ext_proc HTTP filter is at risk of crashing if a local reply is sent to the external server due to the filter's life time issue. A known situation is the failure of a websocket handshake will trigger a local reply leading to the crash of Envoy. This vulnerability is fixed in 1.33.1, 1.32.4, 1.31.6, and 1.30.10.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-460 - Improper Cleanup on Thrown Exception
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.33.0, < 1.33.1
Affected: >= 1.32.0, < 1.32.4
Affected: >= 1.31.0, < 1.31.6
Affected: < 1.30.10
Create a notification for this product.
Show details on NVD website

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CVE-2024-53271 (GCVE-0-2024-53271)

Vulnerability from nvd – Published: 2024-12-18 19:12 – Updated: 2024-12-18 21:34
VLAI
Title
HTTP/1.1 multiple issues with envoy.reloadable_features.http1_balsa_delay_reset in envoy
Summary
Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to upgrade. There are no known workarounds for this issue.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.31.0, < 1.31.5
Affected: >= 1.32.0, < 1.32.3
Create a notification for this product.
Show details on NVD website

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CVE-2026-26330 (GCVE-0-2026-26330)

Vulnerability from cvelistv5 – Published: 2026-03-10 19:19 – Updated: 2026-03-10 20:17
VLAI
Title
Envoy global rate limit may crash when the response phase limit is enabled and the response phase request is failed directly
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, At the rate limit filter, if the response phase limit with apply_on_stream_done in the rate limit configuration is enabled and the response phase limit request fails directly, it may crash Envoy. When both the request phase limit and response phase limit are enabled, the safe gRPC client instance will be re-used for both the request phase request and response phase request. But after the request phase request is done, the inner state of the request phase limit request in gRPC client is not cleaned up. When a second limit request is sent at response phase, and the second limit request fails directly, the previous request's inner state may be accessed and result in crash. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26311 (GCVE-0-2026-26311)

Vulnerability from cvelistv5 – Published: 2026-03-10 19:14 – Updated: 2026-03-10 19:34
VLAI
Title
Envoy HTTP: filter chain execution on reset streams causing UAF crash
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, a logic vulnerability in Envoy's HTTP connection manager (FilterManager) that allows for Zombie Stream Filter Execution. This issue creates a "Use-After-Free" (UAF) or state-corruption window where filter callbacks are invoked on an HTTP stream that has already been logically reset and cleaned up. The vulnerability resides in source/common/http/filter_manager.cc within the FilterManager::decodeData method. The ActiveStream object remains valid in memory during the deferred deletion window. If a DATA frame arrives on this stream immediately after the reset (e.g., in the same packet processing cycle), the HTTP/2 codec invokes ActiveStream::decodeData, which cascades to FilterManager::decodeData. FilterManager::decodeData fails to check the saw_downstream_reset_ flag. It iterates over the decoder_filters_ list and invokes decodeData() on filters that have already received onDestroy(). This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26310 (GCVE-0-2026-26310)

Vulnerability from cvelistv5 – Published: 2026-03-10 19:08 – Updated: 2026-03-10 20:12
VLAI
Title
Crash for scoped ip address in Envoy during DNS
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26309 (GCVE-0-2026-26309)

Vulnerability from cvelistv5 – Published: 2026-03-10 19:04 – Updated: 2026-03-10 20:12
VLAI
Title
Envoy has an off-by-one write in JsonEscaper::escapeString()
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, an off-by-one write in Envoy::JsonEscaper::escapeString() can corrupt std::string null-termination, causing undefined behavior and potentially leading to crashes or out-of-bounds reads when the resulting string is later treated as a C-string. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2026-26308 (GCVE-0-2026-26308)

Vulnerability from cvelistv5 – Published: 2026-03-10 19:01 – Updated: 2026-03-10 20:12
VLAI
Title
Envoy has an RBAC Header Validation Bypass via Multi-Value Header Concatenation
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, the Envoy RBAC (Role-Based Access Control) filter contains a logic vulnerability in how it validates HTTP headers when multiple values are present for the same header name. Instead of validating each header value individually, Envoy concatenates all values into a single comma-separated string. This behavior allows attackers to bypass RBAC policies—specifically "Deny" rules—by sending duplicate headers, effectively obscuring the malicious value from exact-match mechanisms. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5
Affected: >= 1.35.0, < 1.35.9
Affected: < 1.34.13
Create a notification for this product.
Show details on NVD website

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CVE-2025-66220 (GCVE-0-2025-66220)

Vulnerability from cvelistv5 – Published: 2025-12-03 18:31 – Updated: 2025-12-03 19:10
VLAI
Title
Envoy’s TLS certificate matcher for `match_typed_subject_alt_names` may incorrectly treat certificates containing an embedded null byte
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\0) inside an OTHERNAME SAN value as valid matches.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-170 - Improper Null Termination
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6
Affected: >= 1.34.0, <= 1.34.10
Affected: <= 1.33.12
Create a notification for this product.
Show details on NVD website

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CVE-2025-64763 (GCVE-0-2025-64763)

Vulnerability from cvelistv5 – Published: 2025-12-03 18:13 – Updated: 2025-12-03 20:02
VLAI
Title
Envoy forwards early CONNECT data in TCP proxy mode
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, when Envoy is configured in TCP proxy mode to handle CONNECT requests, it accepts client data before issuing a 2xx response and forwards that data to the upstream TCP connection. If a forwarding proxy upstream from Envoy then responds with a non-2xx status, this can cause a de-synchronized CONNECT tunnel state. By default Envoy continues to allow early CONNECT data to avoid disrupting existing deployments. The envoy.reloadable_features.reject_early_connect_data runtime flag can be set to reject CONNECT requests that send data before a 2xx response when intermediaries upstream from Envoy may reject establishment of a CONNECT tunnel.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6
Affected: >= 1.34.0, <= 1.34.10
Affected: <= 1.33.12
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Show details on NVD website

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CVE-2025-64527 (GCVE-0-2025-64527)

Vulnerability from cvelistv5 – Published: 2025-12-03 18:04 – Updated: 2025-12-03 20:18
VLAI
Title
Envoy crashes when JWT authentication is configured with the remote JWKS fetching
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy crashes when JWT authentication is configured with the remote JWKS fetching, allow_missing_or_failed is enabled, multiple JWT tokens are present in the request headers and the JWKS fetch fails. This is caused by a re-entry bug in the JwksFetcherImpl. When the first token's JWKS fetch fails, onJwksError() callback triggers processing of the second token, which calls fetch() again on the same fetcher object. The original callback's reset() then clears the second fetch's state (receiver_ and request_) which causes a crash when the async HTTP response arrives.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6
Affected: >= 1.34.0, <= 1.34.10
Affected: <= 1.33.12
Create a notification for this product.
Show details on NVD website

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CVE-2025-62504 (GCVE-0-2025-62504)

Vulnerability from cvelistv5 – Published: 2025-10-16 21:23 – Updated: 2025-10-17 13:42
VLAI
Title
Envoy Lua filter use-after-free when oversized rewritten response body causes crash
Summary
Envoy is an open source edge and service proxy. Envoy versions earlier than 1.36.2, 1.35.6, 1.34.10, and 1.33.12 contain a use-after-free vulnerability in the Lua filter. When a Lua script executing in the response phase rewrites a response body so that its size exceeds the configured per_connection_buffer_limit_bytes (default 1MB), Envoy generates a local reply whose headers override the original response headers, leaving dangling references and causing a crash. This results in denial of service. Updating to versions 1.36.2, 1.35.6, 1.34.10, or 1.33.12 fixes the issue. Increasing per_connection_buffer_limit_bytes (and for HTTP/2 the initial_stream_window_size) or increasing per_request_buffer_limit_bytes / request_body_buffer_limit can reduce the likelihood of triggering the condition but does not correct the underlying memory safety flaw.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, <= 1.36.1
Affected: >= 1.350, <= 1.35.5
Affected: >= 1.34.0, <= 1.34.9
Affected: <= 1.33.11
Create a notification for this product.
Show details on NVD website

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CVE-2025-62409 (GCVE-0-2025-62409)

Vulnerability from cvelistv5 – Published: 2025-10-16 17:47 – Updated: 2025-10-16 19:22
VLAI
Title
Envoy allows large requests and responses to cause TCP connection pool crash
Summary
Envoy is a cloud-native, open source edge and service proxy. Prior to 1.36.1, 1.35.5, 1.34.9, and 1.33.10, large requests and responses can potentially trigger TCP connection pool crashes due to flow control management in Envoy. It will happen when the connection is closing but upstream data is still coming, resulting in a buffer watermark callback nullptr reference. The vulnerability impacts TCP proxy and HTTP 1 & 2 mixed use cases based on ALPN. This vulnerability is fixed in 1.36.1, 1.35.5, 1.34.9, and 1.33.10.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.36.0, < 1.36.1
Affected: >= 1.35.0, < 1.35.5
Affected: >= 1.34.0, < 1.34.9
Affected: < 1.33.10
Create a notification for this product.
Show details on NVD website

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CVE-2025-55162 (GCVE-0-2025-55162)

Vulnerability from cvelistv5 – Published: 2025-09-03 19:51 – Updated: 2025-09-04 14:29
VLAI
Title
Envoy: oAuth2 Filter Signout route will not clear cookies because of missing "secure;" flag
Summary
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In versions below 1.32.10 and 1.33.0 through 1.33.6, 1.34.0 through 1.34.4 and 1.35.0, insufficient Session Expiration in the Envoy OAuth2 filter leads to failed logout operations. When configured with __Secure- or __Host- prefixed cookie names, the filter fails to append the required Secure attribute to the Set-Cookie header during deletion. Modern browsers ignore this invalid request, causing the session cookie to persist. This allows a user to remain logged in after they believe they have logged out, creating a session hijacking risk on shared computers. The current implementation iterates through the configured cookie names to generate deletion headers but does not check for these prefixes. This failure to properly construct the deletion header means the user's session cookies are never removed by the browser, leaving the session active and allowing the next user of the same browser to gain unauthorized access to the original user's account and data. This is fixed in versions 1.32.10, 1.33.7, 1.34.5 and 1.35.1.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-613 - Insufficient Session Expiration
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.35.0, < 1.35.1
Affected: >= 1.34.0, < 1.34.5
Affected: >= 1.33.0, < 1.33.7
Affected: <= 1.32.0, < 1.32.10
Create a notification for this product.
Show details on NVD website

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CVE-2025-54588 (GCVE-0-2025-54588)

Vulnerability from cvelistv5 – Published: 2025-09-02 23:39 – Updated: 2025-09-03 20:27
VLAI
Title
Envoy: Race condition in Dynamic Forward Proxy leads to use-after-free and segmentation faults
Summary
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. Versions 1.34.0 through 1.34.4 and 1.35.0 contain a use-after-free (UAF) vulnerability in the DNS cache, causing abnormal process termination. The vulnerability is in Envoy's Dynamic Forward Proxy implementation, occurring when a completion callback for a DNS resolution triggers new DNS resolutions or removes existing pending resolutions. This condition may occur when the following conditions are met: dynamic Forwarding Filter is enabled, the `envoy.reloadable_features.dfp_cluster_resolves_hosts` runtime flag is enabled, and the Host header is modified between the Dynamic Forwarding Filter and Router filters. This issue is resolved in versions 1.34.5 and 1.35.1. To work around this issue, set the envoy.reloadable_features.dfp_cluster_resolves_hosts runtime flag to false.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.34.0, < 1.34.5
Affected: >= 1.35.0, < 1.35.1
Create a notification for this product.
Show details on NVD website

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CVE-2025-46821 (GCVE-0-2025-46821)

Vulnerability from cvelistv5 – Published: 2025-05-07 21:24 – Updated: 2025-05-08 14:11
VLAI
Title
Envoy vulnerable to bypass of RBAC uri_template permission
Summary
Envoy is a cloud-native edge/middle/service proxy. Prior to versions 1.34.1, 1.33.3, 1.32.6, and 1.31.8, Envoy's URI template matcher incorrectly excludes the `*` character from a set of valid characters in the URI path. As a result URI path containing the `*` character will not match a URI template expressions. This can result in bypass of RBAC rules when configured using the `uri_template` permissions. This vulnerability is fixed in Envoy versions v1.34.1, v1.33.3, v1.32.6, v1.31.8. As a workaround, configure additional RBAC permissions using `url_path` with `safe_regex` expression.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-186 - Overly Restrictive Regular Expression
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: < 1.31.8
Affected: >= 1.32.0, < 1.32.6
Affected: >= 1.33.0, < 1.33.3
Affected: >= 1.34.0, < 1.34.1
Create a notification for this product.
Show details on NVD website

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CVE-2025-30157 (GCVE-0-2025-30157)

Vulnerability from cvelistv5 – Published: 2025-03-21 14:49 – Updated: 2025-03-21 15:15
VLAI
Title
Envoy crashes when HTTP ext_proc processes local replies
Summary
Envoy is a cloud-native high-performance edge/middle/service proxy. Prior to 1.33.1, 1.32.4, 1.31.6, and 1.30.10, Envoy's ext_proc HTTP filter is at risk of crashing if a local reply is sent to the external server due to the filter's life time issue. A known situation is the failure of a websocket handshake will trigger a local reply leading to the crash of Envoy. This vulnerability is fixed in 1.33.1, 1.32.4, 1.31.6, and 1.30.10.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-460 - Improper Cleanup on Thrown Exception
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.33.0, < 1.33.1
Affected: >= 1.32.0, < 1.32.4
Affected: >= 1.31.0, < 1.31.6
Affected: < 1.30.10
Create a notification for this product.
Show details on NVD website

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CVE-2024-53271 (GCVE-0-2024-53271)

Vulnerability from cvelistv5 – Published: 2024-12-18 19:12 – Updated: 2024-12-18 21:34
VLAI
Title
HTTP/1.1 multiple issues with envoy.reloadable_features.http1_balsa_delay_reset in envoy
Summary
Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to upgrade. There are no known workarounds for this issue.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.31.0, < 1.31.5
Affected: >= 1.32.0, < 1.32.3
Create a notification for this product.
Show details on NVD website

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