CVE-2026-15778: Chromium: CVE-2026-15778 Insufficient validation of untrusted input in Navigation

unknownCVE-2026-15778

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: ChromiumOther

What: Insufficient validation of untrusted input in Navigation.
Who is affected: Users of Chromium-based browsers, including Microsoft Edge.
Urgency: Remediation is necessary as it may lead to security vulnerabilities.
Action: Update to the latest version of Chromium or Microsoft Edge.

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-2026-15778

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-2026-157780.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-15778	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 vulnerabilitiescert-bund
unknownMicrosoft Edge Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Microsoft Edge (July 20, 2026)cert-fr-avis
unknownGoogle Chrome Multiple Vulnerabilitieshkcert
unknownDSA-6390-1 chromium - security updatedebian
unknownMultiple vulnerabilities in Google Chrome (July 15, 2026)cert-fr-avis
mediumCVE-2026-15778: Insufficient validation of untrusted input in Navigation in Google Chrome prior to 150.0.7871.…nvd