Not analysed yet
We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.
Severity and exploitation
No source has published a CVSS score for this record yet.
- CISA KEV Not listed.
- EPSS 0.026, the 85th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
Sources
References from the CNA
- www.mozilla.org/security/advisories/mfsa2020-08/
- www.mozilla.org/security/advisories/mfsa2020-10/
- www.mozilla.org/security/advisories/mfsa2020-09/
- bugzilla.mozilla.org/show_bug.cgi?id=1612308
- usn.ubuntu.com/4328-1/
- usn.ubuntu.com/4335-1/
- packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html