CVE-2026-17947: Chromium: CVE-2026-17947 Use after free in WebSockets
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-17947
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-2026-179470.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-17947 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
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
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- unknownCVE-2026-13867: Chromium: CVE-2026-13867 Inappropriate implementation in Geolocation2026-07-14
- mediumCVE-2026-59926: Mistune: XSS via unescaped class option in Admonition directive2026-07-14