RHSA-2026:13977: firefox Red Hat
CVSS: 8.8v3.1HighPublished
Published 07-05-2026Last modified 16-10-2026
Vulnerability summary
RHSA-2026:13977 is a high (CVSS 8.8) vulnerability in firefox Red Hat.
CVSS score
8.8/10
010
High · v3.1 (OSV · Red hat), selected by version preferenceEPSS score
Not scored
0%100%
No EPSS score yetKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 5 · Downstream 0Timeline
- 07-05-2026PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
Description
Red Hat Security Advisory: firefox security update
CVSS metrics
1 score · 1 source · 1 versionHigh 8.8Preferred score · OSV · Red hat (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesSingle source
EPSS trend
No EPSS score has been published for this record yet.
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Redhat2 products
- firefox< 0:140.9.1-2.el7_9
- firefox-debuginfo< 0:140.9.1-2.el7_9
1 vendor · 2 products
