CVE-2026-17954: Policy bypass in MHTML in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted MHTML page. (Chromium security severity: Low)

mediumCVSS 4.3CVE-2026-17954

Policy bypass in MHTML in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted MHTML page. (Chromium security severity: Low)

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 4.3
Published: 2026-07-30
Last updated: 2026-08-03
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-17954

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-2026-179540.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-17954	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownCVE-2026-17954: Chromium: CVE-2026-17954 Policy bypass in MHTMLmsrc

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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.

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