CVE-2026-55766
1 advisory.
Packagist/guzzlehttp/psr7 CVE-2026-55766: medium 4.8, EPSS 0.23%
guzzlehttp/psr7: CRLF Injection in HTTP Start-Line Serialization
Action: Upgrade guzzlehttp/psr7 to 2.12.1 or later.
composer require guzzlehttp/psr7:2.12.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.12.1 | - |
Fixed versions
| 2.12.1 |
Sources
- osv: GHSA-vm85-hxw5-5432
- https://github.com/guzzle/psr7/security/advisories/GHSA-vm85-hxw5-5432
- https://github.com/guzzle/psr7
CVE-2026-55766 · published · modified · JSON