Fluid Attacks Database

Description

guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
debian 14	guzzle	=7.11.0-1 \|\| =7.12.0-1 \|\| =7.12.1-1 \|\| =7.12.3-1 \|\| =7.13.1-1 \|\| =7.14.0-1 \|\| =7.14.1-1 \|\| =7.9.2-0.1 \|\| >=0 <7.14.2-1	7.14.2-1
packagist	guzzlehttp/guzzle	>=0 <7.14.2	7.14.2
debian 12	guzzle	=7.11.0-1 \|\| =7.12.0-1 \|\| =7.12.1-1 \|\| =7.12.3-1 \|\| =7.13.1-1 \|\| =7.14.0-1 \|\| =7.14.1-1 \|\| =7.14.2-1 \|\| =7.15.0-1 \|\| =7.15.1-1 \|\| =7.15.2-1 \|\| =7.15.3-1 \|\| =7.15.5-1 \|\| =7.4.5-1 \|\| =7.9.2-0.1 \|\| =8.0.1-1 \|\| =8.0.2-1 \|\| =8.1.0-1 \|\| =8.2.0-1	-
debian 13	guzzle	=7.11.0-1 \|\| =7.12.0-1 \|\| =7.12.1-1 \|\| =7.12.3-1 \|\| =7.13.1-1 \|\| =7.14.0-1 \|\| =7.14.1-1 \|\| =7.14.2-1 \|\| =7.15.0-1 \|\| =7.15.1-1 \|\| =7.15.2-1 \|\| =7.15.3-1 \|\| =7.15.5-1 \|\| =7.9.2-0.1 \|\| =8.0.1-1 \|\| =8.0.2-1 \|\| =8.1.0-1 \|\| =8.2.0-1	-

Aliases

1. CVE-2026-673392. NVD-2026-673393. OSV-DEBIAN-2026-673394. OSV-2026-673395. GHSA-94pj-82f3-465w6. GCVE-2026-673397. SECURITY-TRACKER-CVE-2026-67339

References

1. https://github.com/guzzle/guzzle/security/advisories/GHSA-94pj-82f3-465w2. https://github.com/guzzle/guzzle/pull/38763. https://github.com/guzzle/guzzle/commit/9e4580d4b9981e903dc6323fe37f50a96e85b05e4. https://github.com/guzzle/guzzle/releases/tag/7.14.25. https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-proxy-authorization-header-disclosure

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