CVE record · CVE-2026-11856

cross-origin Digest auth state leak

CVSS 9.8 CriticalCriticalEPSS 0.0069 · 52nd percentile

Critical, because:

CVSS score 9.8: 9.0 or more.

Published by the CVE Program (CNA: curl) at 3 Jul 2026, 06:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
curl	curl	affected 7.10.6 to before 8.14.2 semver affected 8.15.0 to before 8.16.1 semver affected 8.17.0 to before 8.20.1 semver Other versions: unaffected
curl	curl	affected 334d78cd18a7310144383929bdcef34ffbf6159b to before 5c6b4880357ab3e72967c1c45cae0f96ffabc535 git Other versions: unaffected
curl	curl	affected 8.20.0 affected 8.19.0 affected 8.18.0 affected 8.17.0 affected 8.16.0 affected 8.15.0 affected 8.14.1 affected 8.14.0 affected 8.13.0 affected 8.12.1 affected 8.12.0 affected 8.11.1 and 160 more Other versions: unaffected

Identifiers: CVE-2026-11856
CNA: curl
Weakness (CWE): CWE-294
Tags: curl
Authentication bypass
Published: 3 Jul 2026
Updated: 15 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	ADP (CISA-ADP)

CISA KEV Not listed.
EPSS 0.0069, the 52nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 3 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.