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Advisories

guzzlehttp/guzzle before 7.14.2 Proxy-Authorization Header Disclosure

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severity
medium
date
Affecting

  • guzzle >= 0, < 7.14.2

CWE
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
GrahamCampbell
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.

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