Authentication Bypass Affecting libcurl-minimal package, versions <0:7.76.1-40.el9_8.7


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.5% (41st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ALMALINUX9-LIBCURLMINIMAL-20056692
  • published23 Sept 2026
  • disclosed21 Sept 2026

Introduced: 21 Sep 2026

NewCVE-2026-8927  (opens in a new tab)
CWE-294  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 libcurl-minimal to version 0:7.76.1-40.el9_8.7 or higher.
This issue was patched in ALSA-2026:69126.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-minimal package and not the libcurl-minimal package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests. Specifically, if the initial transfer authenticates against proxyA using Digest auth, a subsequent transfer routed through proxyB erroneously leaks the Proxy-Authorization: header intended solely for proxyA.

CVSS Base Scores

version 3.1