CVE-2026-67339

guzzle: guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in...

CVE-2026-67339 is fixed in guzzle on 1 platform by DEBIAN-CVE-2026-67339 (version 7.14.2-1), released August 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

n/a

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0037

31st percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
guzzle · Debian 14	7.14.2-1	DEBIAN-CVE-2026-67339	Aug 2, 2026

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