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Vulnerability advisory

GHSA-wxmh-65f7-jcvw

Improper header name validation in guzzlehttp/psr7

Published Updated OSV record ↗

Also known as CVE-2023-29197

Severity
  • CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected versions

guzzlehttp/psr7 Packagist

All guzzlehttp/psr7 advisories →
AffectedFixed in
All versions before 1.9.11.9.1Advisories →
Also listed as affected (24)
2.0.0 to before 2.4.52.4.5Advisories →
Also listed as affected (13)

Description

Impact

Improper header parsing. An attacker could sneak in a newline (\n) into both the header names and values. While the specification states that \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n.

Patches

The issue is patched in 1.9.1 and 2.4.5.

Workarounds

There are no known workarounds.

References

References

  • Codex
  • Claude Code
  • VS Code
  • GitHub Copilot
  • Cursor
  • Cline
  • Windsurf
  • Google Anti-gravity
  • OpenCode
  • Pi
  • Gemini CLI
  • Hermes Agent
  • Zed
  • Junie
  • Qwen Code
  • Kiro
  • Kilo Code
  • Factory Droid

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