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14 vulnerabilities by phoenixframework
CVE-2026-58228 (GCVE-0-2026-58228)
Vulnerability from nvd – Published: 2026-07-13 18:04 – Updated: 2026-07-14 04:15
VLAI
EPSS
VEX
Title
Scheme validation bypass in Phoenix.LiveView.Utils leads to XSS via <.link>
Summary
Cross-site scripting vulnerability in phoenixframework phoenix_live_view allows an attacker to bypass URL scheme validation and execute JavaScript in a victim's browser session.
The Phoenix.LiveView.Utils.valid_destination!/2 and Phoenix.LiveView.Utils.valid_live_navigation_destination!/2 functions in lib/phoenix_live_view/utils.ex rely on an internal uri_scheme/1 helper that only detects a scheme when the input's first byte is an ASCII letter. Inputs beginning with an ASCII control character or space fall through to a nil-returning clause, causing the URL to be treated as a safe relative path.
Standard browsers implement the WHATWG URL parser, which strips leading C0 control and space characters before parsing. As a result, an input such as " javascript:alert(1)" is passed unchanged into <.link href={...}> and, when clicked, is parsed by the browser as a javascript: URL that executes attacker-controlled script in the victim's session.
Applications that render user-supplied URLs (for example profile links, redirect targets, or external references) via <.link href={...}> are affected.
This issue affects phoenix_live_view: from 1.2.2 before 1.2.7.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/phoenixframework/phoenix_live_… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-58228.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-58228 | related |
| https://github.com/phoenixframework/phoenix_live_… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix_live_view |
Affected:
1.2.2 , < 1.2.7
(semver)
cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix_live_view |
Affected:
4b63216ae68886db99cf7772af23372d76c40e7e , < 86165533e311469a1b62093fd182d9d874de8106
(git)
cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:* |
Credits
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CVE-2026-56812 (GCVE-0-2026-56812)
Vulnerability from nvd – Published: 2026-07-07 15:22 – Updated: 2026-07-07 16:11
VLAI
EPSS
VEX
Title
Phoenix JavaScript presence client crashes on presence keys colliding with Object.prototype members in Presence.syncState/syncDiff
Summary
Improper Check for Unusual or Exceptional Conditions vulnerability in phoenixframework phoenix (Presence JavaScript client) allows an attacker with ordinary channel access to cause a persistent client-side denial of service against every viewer of a presence channel topic.
This vulnerability is associated with program files assets/js/phoenix/presence.js and program routines Presence.syncState and Presence.syncDiff.
The Phoenix JavaScript presence client checks whether a presence already exists with a bare truthiness test (state[key]) instead of an own-property check. Presence keys can be attacker-controlled, because applications track presences under a username or id supplied by the client. A user who joins a channel choosing a key that is an Object.prototype member name (__proto__, constructor, toString, hasOwnProperty, and similar) makes that lookup return JavaScript's built-in Object.prototype instead of undefined. Because the prototype is truthy, the code treats it as an existing presence and reads .metas.map(...) off it, which throws an uncaught TypeError.
The exception propagates out of the presence message handler, so the local state is never updated and onSync() never fires. Because the malicious key is tracked on the server, it is re-pushed on every presence update and keeps re-throwing, so presence sync stays broken for every viewer of that channel topic until the attacker leaves. Both syncState and syncDiff use the same unsafe existence-check pattern. The impact is limited to the affected topic and is a read-time confusion of the prototype object, not a mutation of Object.prototype (it is not prototype pollution).
This issue affects phoenix: from 1.2.0-rc.0 before 1.5.15, from 1.6.0-rc.0 before 1.6.17, from 1.7.0-rc.0 before 1.7.24, and from 1.8.0-rc.0 before 1.8.9.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix |
Affected:
1.2.0-rc.0 , < 1.5.15
(semver)
Affected: 1.6.0-rc.0 , < 1.6.17 (semver) Affected: 1.7.0-rc.0 , < 1.7.24 (semver) Affected: 1.8.0-rc.0 , < 1.8.9 (semver) cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix |
Affected:
2270aaf21bd02c6a6a1022820564efb605a97655 , < *
(git)
cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
Credits
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CVE-2026-56811 (GCVE-0-2026-56811)
Vulnerability from nvd – Published: 2026-07-07 15:09 – Updated: 2026-07-07 16:14
VLAI
EPSS
VEX
Title
Phoenix transports do not limit channel joins per connection, enabling process-exhaustion denial of service
Summary
Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix (Phoenix.Socket module) allows an unauthenticated attacker to cause a denial of service against any endpoint that mounts a Phoenix socket with a reachable channel transport (WebSocket or LongPoll).
This vulnerability is associated with program files lib/phoenix/socket.ex and program routine 'Elixir.Phoenix.Socket':handle_in/4.
Phoenix transports do not limit the number of channels that a single transport process may join. Every phx_join message a client sends over one connection starts a persistent channel process, and the socket process accepts an unbounded number of them. A single unauthenticated client can therefore open one WebSocket or LongPoll connection and stream a large number of phx_join messages, spawning hundreds of thousands of channel processes over that one connection and eventually reaching the BEAM maximum process limit. Once the process table is exhausted the virtual machine can no longer start new processes, denying service to legitimate traffic across the whole node. Because the amplification happens inside a single connection, network-layer connection caps and rate limiting do not mitigate it.
The fix adds a :max_channels_per_transport option (default 100) that bounds the number of channels a single transport process can join, forcing abusive clients to open many connections instead, where external load balancers and reverse proxies can throttle them.
This issue affects phoenix: from 0.11.0 before 1.5.15, from 1.6.0-rc.0 before 1.6.17, from 1.7.0-rc.0 before 1.7.24, and from 1.8.0-rc.0 before 1.8.9.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix |
Affected:
0.11.0 , < 1.5.15
(semver)
Affected: 1.6.0-rc.0 , < 1.6.17 (semver) Affected: 1.7.0-rc.0 , < 1.7.24 (semver) Affected: 1.8.0-rc.0 , < 1.8.9 (semver) cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix |
Affected:
14a297e88023cb280a577962a49a0bbdeef9f4eb , < *
(git)
cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
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CVE-2026-32689 (GCVE-0-2026-32689)
Vulnerability from nvd – Published: 2026-05-05 15:17 – Updated: 2026-05-07 04:25
VLAI
EPSS
VEX
Title
Long-poll NDJSON body splitting causes unbounded memory allocation in Phoenix
Summary
Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix allows a denial of service via the long-poll transport's NDJSON body handling.
In 'Elixir.Phoenix.Transports.LongPoll':publish/4, when a POST request is received with Content-Type: application/x-ndjson, the request body is split on newline characters using String.split/2 with no limit on the number of resulting segments. An attacker can send a body consisting entirely of newline bytes, causing a 1:1 amplification into a list of empty binaries — a 1 MB body produces approximately one million list elements, an 8 MB body approximately 8.4 million. Each element is then walked by Enum.map, materializing another list of the same size. This exhausts BEAM memory and schedulers, crashing the node and terminating all active sessions.
A session token required to reach the vulnerable endpoint is freely obtainable by any client via an unauthenticated GET request to the same URL with a matching Origin header, making this attack effectively unauthenticated.
This issue affects phoenix: from 1.7.0 before 1.7.22 and 1.8.6.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/phoenixframework/phoenix/secur… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-32689.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-32689 | related |
| https://github.com/phoenixframework/phoenix/commi… | patch |
| https://github.com/phoenixframework/phoenix/commi… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix |
Affected:
1.7.0 , < 1.7.22
(semver)
Affected: 1.8.0 , < 1.8.6 (semver) cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix |
Affected:
2674c6ea30634667f9b09966b90269393b445953 , < *
(git)
cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
Credits
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CVE-2021-46871 (GCVE-0-2021-46871)
Vulnerability from nvd – Published: 2023-01-10 00:00 – Updated: 2025-04-09 17:21
VLAI
EPSS
VEX
Summary
tag.ex in Phoenix Phoenix.HTML (aka phoenix_html) before 3.0.4 allows XSS in HEEx class attributes.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
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CVE-2022-42975 (GCVE-0-2022-42975)
Vulnerability from nvd – Published: 2022-10-17 00:00 – Updated: 2025-05-10 03:06
VLAI
EPSS
VEX
Summary
socket/transport.ex in Phoenix before 1.6.14 mishandles check_origin wildcarding. NOTE: LiveView applications are unaffected by default because of the presence of a LiveView CSRF token.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
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CVE-2017-1000163 (GCVE-0-2017-1000163)
Vulnerability from nvd – Published: 2017-11-17 21:00 – Updated: 2024-09-17 03:59
VLAI
EPSS
VEX
Summary
The Phoenix Framework versions 1.0.0 through 1.0.4, 1.1.0 through 1.1.6, 1.2.0, 1.2.2 and 1.3.0-rc.0 are vulnerable to unvalidated URL redirection, which may result in phishing or social engineering attacks.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
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|---|---|
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CVE-2026-58228 (GCVE-0-2026-58228)
Vulnerability from cvelistv5 – Published: 2026-07-13 18:04 – Updated: 2026-07-14 04:15
VLAI
EPSS
VEX
Title
Scheme validation bypass in Phoenix.LiveView.Utils leads to XSS via <.link>
Summary
Cross-site scripting vulnerability in phoenixframework phoenix_live_view allows an attacker to bypass URL scheme validation and execute JavaScript in a victim's browser session.
The Phoenix.LiveView.Utils.valid_destination!/2 and Phoenix.LiveView.Utils.valid_live_navigation_destination!/2 functions in lib/phoenix_live_view/utils.ex rely on an internal uri_scheme/1 helper that only detects a scheme when the input's first byte is an ASCII letter. Inputs beginning with an ASCII control character or space fall through to a nil-returning clause, causing the URL to be treated as a safe relative path.
Standard browsers implement the WHATWG URL parser, which strips leading C0 control and space characters before parsing. As a result, an input such as " javascript:alert(1)" is passed unchanged into <.link href={...}> and, when clicked, is parsed by the browser as a javascript: URL that executes attacker-controlled script in the victim's session.
Applications that render user-supplied URLs (for example profile links, redirect targets, or external references) via <.link href={...}> are affected.
This issue affects phoenix_live_view: from 1.2.2 before 1.2.7.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/phoenixframework/phoenix_live_… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-58228.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-58228 | related |
| https://github.com/phoenixframework/phoenix_live_… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix_live_view |
Affected:
1.2.2 , < 1.2.7
(semver)
cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix_live_view |
Affected:
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(git)
cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:* |
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CVE-2026-56812 (GCVE-0-2026-56812)
Vulnerability from cvelistv5 – Published: 2026-07-07 15:22 – Updated: 2026-07-07 16:11
VLAI
EPSS
VEX
Title
Phoenix JavaScript presence client crashes on presence keys colliding with Object.prototype members in Presence.syncState/syncDiff
Summary
Improper Check for Unusual or Exceptional Conditions vulnerability in phoenixframework phoenix (Presence JavaScript client) allows an attacker with ordinary channel access to cause a persistent client-side denial of service against every viewer of a presence channel topic.
This vulnerability is associated with program files assets/js/phoenix/presence.js and program routines Presence.syncState and Presence.syncDiff.
The Phoenix JavaScript presence client checks whether a presence already exists with a bare truthiness test (state[key]) instead of an own-property check. Presence keys can be attacker-controlled, because applications track presences under a username or id supplied by the client. A user who joins a channel choosing a key that is an Object.prototype member name (__proto__, constructor, toString, hasOwnProperty, and similar) makes that lookup return JavaScript's built-in Object.prototype instead of undefined. Because the prototype is truthy, the code treats it as an existing presence and reads .metas.map(...) off it, which throws an uncaught TypeError.
The exception propagates out of the presence message handler, so the local state is never updated and onSync() never fires. Because the malicious key is tracked on the server, it is re-pushed on every presence update and keeps re-throwing, so presence sync stays broken for every viewer of that channel topic until the attacker leaves. Both syncState and syncDiff use the same unsafe existence-check pattern. The impact is limited to the affected topic and is a read-time confusion of the prototype object, not a mutation of Object.prototype (it is not prototype pollution).
This issue affects phoenix: from 1.2.0-rc.0 before 1.5.15, from 1.6.0-rc.0 before 1.6.17, from 1.7.0-rc.0 before 1.7.24, and from 1.8.0-rc.0 before 1.8.9.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix |
Affected:
1.2.0-rc.0 , < 1.5.15
(semver)
Affected: 1.6.0-rc.0 , < 1.6.17 (semver) Affected: 1.7.0-rc.0 , < 1.7.24 (semver) Affected: 1.8.0-rc.0 , < 1.8.9 (semver) cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix |
Affected:
2270aaf21bd02c6a6a1022820564efb605a97655 , < *
(git)
cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
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CVE-2026-56811 (GCVE-0-2026-56811)
Vulnerability from cvelistv5 – Published: 2026-07-07 15:09 – Updated: 2026-07-07 16:14
VLAI
EPSS
VEX
Title
Phoenix transports do not limit channel joins per connection, enabling process-exhaustion denial of service
Summary
Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix (Phoenix.Socket module) allows an unauthenticated attacker to cause a denial of service against any endpoint that mounts a Phoenix socket with a reachable channel transport (WebSocket or LongPoll).
This vulnerability is associated with program files lib/phoenix/socket.ex and program routine 'Elixir.Phoenix.Socket':handle_in/4.
Phoenix transports do not limit the number of channels that a single transport process may join. Every phx_join message a client sends over one connection starts a persistent channel process, and the socket process accepts an unbounded number of them. A single unauthenticated client can therefore open one WebSocket or LongPoll connection and stream a large number of phx_join messages, spawning hundreds of thousands of channel processes over that one connection and eventually reaching the BEAM maximum process limit. Once the process table is exhausted the virtual machine can no longer start new processes, denying service to legitimate traffic across the whole node. Because the amplification happens inside a single connection, network-layer connection caps and rate limiting do not mitigate it.
The fix adds a :max_channels_per_transport option (default 100) that bounds the number of channels a single transport process can join, forcing abusive clients to open many connections instead, where external load balancers and reverse proxies can throttle them.
This issue affects phoenix: from 0.11.0 before 1.5.15, from 1.6.0-rc.0 before 1.6.17, from 1.7.0-rc.0 before 1.7.24, and from 1.8.0-rc.0 before 1.8.9.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix |
Affected:
0.11.0 , < 1.5.15
(semver)
Affected: 1.6.0-rc.0 , < 1.6.17 (semver) Affected: 1.7.0-rc.0 , < 1.7.24 (semver) Affected: 1.8.0-rc.0 , < 1.8.9 (semver) cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix |
Affected:
14a297e88023cb280a577962a49a0bbdeef9f4eb , < *
(git)
cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
Credits
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CVE-2026-32689 (GCVE-0-2026-32689)
Vulnerability from cvelistv5 – Published: 2026-05-05 15:17 – Updated: 2026-05-07 04:25
VLAI
EPSS
VEX
Title
Long-poll NDJSON body splitting causes unbounded memory allocation in Phoenix
Summary
Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix allows a denial of service via the long-poll transport's NDJSON body handling.
In 'Elixir.Phoenix.Transports.LongPoll':publish/4, when a POST request is received with Content-Type: application/x-ndjson, the request body is split on newline characters using String.split/2 with no limit on the number of resulting segments. An attacker can send a body consisting entirely of newline bytes, causing a 1:1 amplification into a list of empty binaries — a 1 MB body produces approximately one million list elements, an 8 MB body approximately 8.4 million. Each element is then walked by Enum.map, materializing another list of the same size. This exhausts BEAM memory and schedulers, crashing the node and terminating all active sessions.
A session token required to reach the vulnerable endpoint is freely obtainable by any client via an unauthenticated GET request to the same URL with a matching Origin header, making this attack effectively unauthenticated.
This issue affects phoenix: from 1.7.0 before 1.7.22 and 1.8.6.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/phoenixframework/phoenix/secur… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-32689.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-32689 | related |
| https://github.com/phoenixframework/phoenix/commi… | patch |
| https://github.com/phoenixframework/phoenix/commi… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix |
Affected:
1.7.0 , < 1.7.22
(semver)
Affected: 1.8.0 , < 1.8.6 (semver) cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
|
| phoenixframework | phoenix |
Affected:
2674c6ea30634667f9b09966b90269393b445953 , < *
(git)
cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
Credits
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CVE-2021-46871 (GCVE-0-2021-46871)
Vulnerability from cvelistv5 – Published: 2023-01-10 00:00 – Updated: 2025-04-09 17:21
VLAI
EPSS
VEX
Summary
tag.ex in Phoenix Phoenix.HTML (aka phoenix_html) before 3.0.4 allows XSS in HEEx class attributes.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
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CVE-2022-42975 (GCVE-0-2022-42975)
Vulnerability from cvelistv5 – Published: 2022-10-17 00:00 – Updated: 2025-05-10 03:06
VLAI
EPSS
VEX
Summary
socket/transport.ex in Phoenix before 1.6.14 mishandles check_origin wildcarding. NOTE: LiveView applications are unaffected by default because of the presence of a LiveView CSRF token.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-863 - Incorrect Authorization
Assigner
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CVE-2017-1000163 (GCVE-0-2017-1000163)
Vulnerability from cvelistv5 – Published: 2017-11-17 21:00 – Updated: 2024-09-17 03:59
VLAI
EPSS
VEX
Summary
The Phoenix Framework versions 1.0.0 through 1.0.4, 1.1.0 through 1.1.6, 1.2.0, 1.2.2 and 1.3.0-rc.0 are vulnerable to unvalidated URL redirection, which may result in phishing or social engineering attacks.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://elixirforum.com/t/security-releases-for-p… | x_refsource_CONFIRM |
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