PatchTheCVECVE-2026-55945: Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge
CVE-2026-55945 is a medium-severity flaw (CVSS 4.2) affecting edge chromium. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to disclose information locally.
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.2 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 92%) |
| CISA exploited list | No |
| Weakness | CWE-362 |
| Published | 2026-07-03 |
| Last modified | 2026-10-25 |
Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-55945?
edge chromium: upgrade to 150.0.4078.48. Exact commands for each OS are on this page.
Is CVE-2026-55945 being exploited?
CVE-2026-55945 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-55945 affect?
CVE-2026-55945 affects edge chromium. Severity is medium (CVSS 4.2). Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to disclose information locally.
How urgent is CVE-2026-55945?
Priority 22/100. On your watchlist
Software pages
Microsoft Edge vulnerabilities · Chromium vulnerabilities
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