CVE-2026-15902: Chromium: CVE-2026-15902 Use after free in Cast

unknownCVE-2026-15902

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.

CSIRTS triage

vendor: Google product: Chromium Memory corruption

What: This vulnerability is a use after free in Cast.
Who is affected: Microsoft Edge (Chromium-based) users are affected.
Urgency: Remediation is necessary as it could lead to exploitation, although the severity is currently unknown.
Action: Update to the latest version of Chromium to address this vulnerability.

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

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-15902

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-2026-159020.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-15902	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[NEW] [high] Google Chrome: Multiple vulnerabilities allow unspecified attackcert-bund
unknownDSA-6396-1 chromium - security updatedebian
highCVE-2026-15902: Use after free in Cast in Google Chrome prior to 150.0.7871.128 allowed a remote attacker to e…nvd
unknownMicrosoft Edge Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Microsoft Edge (July 20, 2026)cert-fr-avis
unknownGoogle Chrome Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Google Chrome (July 17, 2026)cert-fr-avis

Recent advisories for Chromium

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.

unknownDSA-6408-1 chromium - security updatedebian · 2026-07-31
mediumCVE-2026-18019: Side-channel information leakage in Media in Google Chrome prior to 151.0.7922.72 allowed a re…nvd · 2026-07-30
mediumCVE-2026-18018: Inappropriate implementation in Updater in Google Chrome on Windows prior to 151.0.7922.72 all…nvd · 2026-07-30
highCVE-2026-18017: Use after free in Dawn in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to ex…nvd · 2026-07-30
mediumCVE-2026-18016: Insufficient policy enforcement in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.…nvd · 2026-07-30
mediumCVE-2026-18013: Inappropriate implementation in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 …nvd · 2026-07-30