Authentication Bypass Affecting libcurl package, versions <0:8.12.1-4.el10_2.6


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.69% (51st percentile)

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  • Snyk IDSNYK-ORACLE10-LIBCURL-20066036
  • published23 Sept 2026
  • disclosed3 Jul 2026

Introduced: 3 Jul 2026

CVE-2026-11856  (opens in a new tab)
CWE-294  (opens in a new tab)

How to fix?

Upgrade Oracle:10 libcurl to version 0:8.12.1-4.el10_2.6 or higher.
This issue was patched in ELSA-2026-69125.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Oracle. See How to fix? for Oracle:10 relevant fixed versions and status.

Successfully using libcurl to do a transfer to a specific HTTP origin (hostA) with Digest authentication and then changing the origin to a different one (hostB) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the Authorization: header field meant for hostA, to hostB.

CVSS Base Scores

version 3.1