CVE-2026-59882
Last modified
CVE-2026-59882 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.3, Uri::assertValidHost() does not reject URI host components containing authority delimiters, embedded ports, or malformed IPv6 brackets, allowing Uri::getHost() to disagree with the URI authority used for security or routing decisions. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
Description
guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.3, Uri::assertValidHost() does not reject URI host components containing authority delimiters, embedded ports, or malformed IPv6 brackets, allowing Uri::getHost() to disagree with the URI authority used for security or routing decisions. This issue is fixed in version 2.12.3.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Guzzlephp | Psr-7 | < 2.12.3 |
References
- https://github.com/guzzle/psr7/pull/811Issue Tracking, Patch
- https://github.com/guzzle/psr7/releases/tag/2.12.3Product, Release Notes
- https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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