Improper Input Validation in guzzlehttp/psr7

Description

guzzlehttp/psr7 is a PSR-7 HTTP message library. Versions prior to 1.8.4 and 2.1.1 are vulnerable to improper header parsing. An attacker could sneak in a new line character and pass untrusted values. The issue is patched in 1.8.4 and 2.1.1. There are currently no known workarounds.

Scores

EPSS (exploitation in 30 days)

2.5% · top 15% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• CWE-20: Improper Input Validation (opens in a new tab)All about CWE-20 and its CVEs

Affected products

• guzzle · psr7

  • affected < 1.8.4
  • affected >= 2.0.0, < 2.1.1

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Packagistguzzlehttp/psr7GHSA-q7rv-6hp3-vh96 (opens in a new tab)

References (4)

• https://github.com/guzzle/psr7/security/advisories/GHSA-q7rv-6hp3-vh96 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/guzzle/psr7/pull/485/commits/e55afaa3fc138c89adf3b55a8ba20dc60d17f1f1 (opens in a new tab)x_refsource_MISCx_transferred
• https://github.com/guzzle/psr7/pull/486/commits/9a96d9db668b485361ed9de7b5bf1e54895df1dc (opens in a new tab)x_refsource_MISCx_transferred
• https://www.drupal.org/sa-core-2022-006 (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-q7rv-6hp3-vh96 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-24775](https://trackcve.app/badge/CVE-2022-24775.svg)](https://trackcve.app/cve/CVE-2022-24775)

Record last updated 23 Apr 2025, 18:45 UTC.