Riskcovery

CVE-2026-11856

cross-origin Digest auth state leak

State
Published
Severity
9.8 Critical
Published
Jul 3, 2026
Updated
Sep 15, 2026
Reserved
Jun 10, 2026

Read the record on cve.org

Description

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`.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

  • CWE-294 Authentication Bypass by Capture-replay

Affected Products

ProductVersions
curlcurl
  • 7.10.6 to before 8.14.2Affected
  • 8.15.0 to before 8.16.1Affected
  • 8.17.0 to before 8.20.1Affected
curlcurl
  • 334d78cd18a7310144383929bdcef34ffbf6159b to before 5c6b4880357ab3e72967c1c45cae0f96ffabc535Affected
curlcurl
  • 8.20.0Affected
  • 8.19.0Affected
  • 8.18.0Affected
  • 8.17.0Affected
  • 8.16.0Affected
  • 8.15.0Affected
  • 8.14.1Affected
  • 8.14.0Affected
  • 8.13.0Affected
  • 8.12.1Affected
  • 8.12.0Affected
  • 8.11.1Affected
  • 8.11.0Affected
  • 8.10.1Affected
  • 8.10.0Affected
  • 8.9.1Affected
  • 8.9.0Affected
  • 8.8.0Affected
  • 8.7.1Affected
  • 8.7.0Affected
  • 8.6.0Affected
  • 8.5.0Affected
  • 8.4.0Affected
  • 8.3.0Affected
  • 8.2.1Affected
  • and 147 more versions

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.