CVE-2022-31043: Fix failure to strip Authorization header on HTTP downgrade

unknown Affects guzzlehttp/guzzle. Feed 2026.10.29.4, updated 2026-10-29; CVE published 2022.

Fix failure to strip Authorization header on HTTP downgrade

Package: guzzlehttp/guzzle Composer
Affected versions: >=7 and <7.4.4 or >=4 and <6.5.7
Fixed in: 7.4.4, 6.5.7
Severity: unknown
Exploitation: not on CISA KEV · EPSS 2% (80.6th percentile)
Source: friendsofphp

References

https://github.com/guzzle/guzzle/security/advisories/GHSA-w248-ffj2-4v5q

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

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Related advisories

CVE-2016-5385 high HTTP Proxy header vulnerability same package: guzzlehttp/guzzle
CVE-2022-31042 high Failure to strip the Cookie header on change in host or HTTP downgrade same package: guzzlehttp/guzzle
CVE-2022-31090 high Authorization header leaked to a different origin on cross-origin redirect (curl handler) same package: guzzlehttp/guzzle
CVE-2022-31091 high Change in port not treated as a change in origin; sensitive headers leaked on redirect same package: guzzlehttp/guzzle
CVE-2022-29248 high Cross-domain cookie leakage in Guzzle same package: guzzlehttp/guzzle
CVE-2026-67353 medium Guzzle: Unbounded response cookies risk denial of service same package: guzzlehttp/guzzle