CVE-2026-67339

mediumCVSS 5.3covered by 1 sourcefirst seen 2026-08-01

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.

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Advisory coverage (1)

mediumCVE-2026-67339: guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers …nvd · 2026-08-01

External references

NVD record for CVE-2026-67339

CVE.org record

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