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4 vulnerabilities by elixir-grpc
CVE-2026-48853 (GCVE-0-2026-48853)
Vulnerability from cvelistv5 – Published: 2026-06-15 21:56 – Updated: 2026-06-17 04:47
VLAI
Title
Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc
Summary
Deserialization of Untrusted Data and Allocation of Resources Without Limits or Throttling vulnerabilities in elixir-grpc grpc allow unauthenticated attackers to crash the BEAM node via atom table exhaustion and, when a decoded term flows into a call site that invokes it, achieve remote code execution on the server.
'Elixir.GRPC.Codec.Erlpack':decode/2 (lib/grpc/codec/erlpack.ex) calls :erlang.binary_to_term/1 on the raw gRPC message body without the :safe option, no size bound, and no type guard. Any unauthenticated peer that sends a request with Content-Type: application/grpc+erlpack can send a crafted payload that mints arbitrary new atoms (which are never garbage-collected, exhausting the bounded atom table and crashing the VM) or that encodes a fun term which, if applied anywhere downstream, executes attacker-controlled code inside the server process.
This issue affects grpc from 0.4.0 before 1.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/elixir-grpc/grpc/security/advi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-48853.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-48853 | related |
| https://github.com/elixir-grpc/grpc/commit/272a97… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| elixir-grpc | grpc |
Affected:
0.4.0 , < 1.0.0
(semver)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
|
| elixir-grpc | grpc |
Affected:
25bcc569fe2cc4478531a6c546c923205fc751c9 , < 272a97a5ea1b46af1819f14a831fcf35fc91f992
(git)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
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CVE-2026-53430 (GCVE-0-2026-53430)
Vulnerability from cvelistv5 – Published: 2026-06-15 21:55 – Updated: 2026-06-17 04:46
VLAI
Title
grpc gzip decompression bomb in GRPC.Compressor.Gzip.decompress/1
Summary
Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (GRPC.Compressor.Gzip, GRPC.Message modules) allows a denial of service via a gzip decompression bomb.
This vulnerability is associated with program files lib/grpc/compressor/gzip.ex, lib/grpc/message.ex and program routines 'Elixir.GRPC.Compressor.Gzip':decompress/1, 'Elixir.GRPC.Message':from_data/2.
'Elixir.GRPC.Compressor.Gzip':decompress/1 calls :zlib.gunzip/1 directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip GRPC.Compressor implementation, it is invoked automatically whenever an incoming gRPC frame carries the grpc-encoding: gzip header. :zlib.gunzip/1 allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The max_receive_message_length limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node's heap and trigger an out-of-memory kill.
This issue affects grpc: from 0.4.0 before 1.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/elixir-grpc/grpc/security/advi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-53430.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-53430 | related |
| https://github.com/elixir-grpc/grpc/commit/1afbab… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| elixir-grpc | grpc |
Affected:
0.4.0 , < 1.0.0
(semver)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
|
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Affected:
beae6800fc8baf126f3fe7107d86a50e105275ba , < 1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc
(git)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
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CVE-2026-48599 (GCVE-0-2026-48599)
Vulnerability from cvelistv5 – Published: 2026-06-15 21:55 – Updated: 2026-06-17 04:46
VLAI
Title
Authorization bypass via path binding override in elixir-grpc/grpc HTTP transcoding
Summary
Authorization Bypass Through User-Controlled Key vulnerability in elixir-grpc grpc allows authenticated attackers to access or modify resources belonging to other users by smuggling a conflicting value for any path-bound field via the query string or request body.
In 'Elixir.GRPC.Server.Transcode':map_request/5 (lib/grpc/server/transcode.ex), all three clauses use Map.merge/2 with path bindings as the first argument, giving them the lowest merge precedence. A request such as GET /users/me/profile?user_id=victim (or a POST with {"user_id": "victim"} when body: "*") yields a decoded protobuf struct where the path-bound field carries the attacker-supplied value rather than the router-extracted value. Any handler that uses the path-bound field for authorization, multi-tenancy scoping, or ownership checks is silently bypassed.
This issue affects grpc from 0.8.0 before 1.0.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/elixir-grpc/grpc/security/advi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-48599.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-48599 | related |
| https://github.com/elixir-grpc/grpc/commit/33b6a0… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| elixir-grpc | grpc |
Affected:
0.8.0 , < 1.0.0
(semver)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
|
| elixir-grpc | grpc |
Affected:
8aaf3d3a8c4c7b08ac65e9c6f254e0d24da1d048 , < 33b6a095dbc91c6dee3c7b90893d7d74952e82e4
(git)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
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CVE-2026-48854 (GCVE-0-2026-48854)
Vulnerability from cvelistv5 – Published: 2026-06-15 21:55 – Updated: 2026-06-17 04:46
VLAI
Title
Unbounded request body accumulation causes memory exhaustion in elixir-grpc/grpc
Summary
Allocation of Resources Without Limits or Throttling vulnerability in elixir-grpc grpc allows unauthenticated attackers to exhaust the BEAM's memory and crash the server by streaming a large or slow-trickle unary request body.
'Elixir.GRPC.Server.Adapters.Cowboy.Handler':read_full_body/3 (lib/grpc/server/adapters/cowboy/handler.ex) accumulates every received chunk into a single growing binary with no size cap. Additionally, when the client omits the grpc-timeout header, the per-chunk read timeout resolves to :infinity, allowing a slow-trickle client to keep the connection alive indefinitely while memory grows. A single connection is sufficient to exhaust server memory and crash the node.
This issue affects grpc from 0.3.1 before 1.0.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/elixir-grpc/grpc/security/advi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-48854.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-48854 | related |
| https://github.com/elixir-grpc/grpc/commit/49e18c… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| elixir-grpc | grpc |
Affected:
0.3.1 , < 1.0.0
(semver)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
|
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Affected:
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(git)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
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