CVE-2026-10536: HTTP/2 stream-dependency tree UAF

criticalCVSS 9.8CVE-2026-10536

CSIRTS triage

Other

What: A critical vulnerability related to HTTP/2 stream-dependency tree.
Who is affected: Affected systems using HTTP/2 are at risk.
Urgency: Remediation is critical due to high severity and potential for exploitation.
Action: Apply necessary updates as they become available.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.8
Published: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-10536

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.

Low exploitation riskCVE-2026-105360.89% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 55% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-10536	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

medium[UPDATE] [medium] cURL: Multiple vulnerabilitiescert-bund
unknownUSN-8525-1: curl vulnerabilitiesubuntu
criticalCVE-2026-10536: A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stre…nvd
unknownMultiple vulnerabilities in cURL and libcurl (June 24, 2026)cert-fr-avis

Recent advisories for HTTP/2 stream-dependency tree

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-10536: A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stre…nvd · 2026-07-03