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CVE-2026-11856: cross-origin Digest auth state leak

mediumCVSS 5.3CVE-2026-11856

CSIRTS triage

Information disclosure
What
There is a cross-origin Digest authentication state leak vulnerability.
Who is affected
Deployments using cross-origin Digest authentication are affected.
Urgency
Remediation is medium urgency due to a severity rating of 5.3.
Action
Apply relevant security updates or mitigations.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 5.3
Published
2026-07-02
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-11856

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-11856coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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