Information Exposure Affecting guzzle package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.37% (29th percentile)

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  • Snyk IDSNYK-DEBIAN12-GUZZLE-18505626
  • published2 Aug 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

CVE-2026-67354  (opens in a new tab)
CWE-201  (opens in a new tab)

How to fix?

There is no fixed version for Debian:12 guzzle.

NVD Description

Note: Versions mentioned in the description apply only to the upstream guzzle package and not the guzzle package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

guzzlehttp/guzzle versions before 7.15.1 contain an information disclosure vulnerability in RedirectMiddleware. When the optional allow_redirects.referer setting is enabled, the middleware copies the URI fragment (the portion after '#') from the referring request into the generated Referer header when following a same-scheme redirect (e.g., HTTPS to HTTPS). An attacker who controls the redirect destination can read this fragment from the incoming Referer header, potentially disclosing one-time login secrets, access tokens, state values, or other sensitive client data to a server never meant to receive it. The referer setting is disabled by default. Fixed in 7.15.1, which strips the fragment before generating the Referer value.

CVSS Base Scores

version 3.1