Red Hat Security Advisory: firefox security update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited : upgrade to 8.10 soon.
Data as of 25 Oct 2026, 19:02 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 9.5% chance of exploitation in 30 days – higher than 95% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 8.10
Exploitation evidence
Disclosed: evidence found.
CVE published 21 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Upgrade redhat/firefox to 8.10.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Red Hatredhat/firefoxpkg:rpm/redhat/firefoxOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released updated Firefox packages that address these vulnerabilities. Users and administrators should apply the Firefox update version 128.10.1-1.el8_10 or later as provided by Red Hat for their respective architectures and Extended Life Cycle versions. Refer to Red Hat's official update instructions at https://access.redhat.com/articles/11258 for detailed remediation steps. No additional mitigation actions are indicated by the vendor advisory.
Description
Two security vulnerabilities (CVE-2025-4918 and CVE-2025-4919) affecting Mozilla Firefox in Red Hat Enterprise Linux 8 have been addressed. Both issues involve out-of-bounds access errors—one when resolving Promise objects and the other when optimizing linear sums. Red Hat has released updated Firefox packages to fix these vulnerabilities. The update is rated as Important by Red Hat Product Security. No confirmed exploits in the wild have been reported at this time.
References
- access.redhat.com/errata/RHSA-2025:8060 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2367016 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2367018 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_8060.json (opens in a new tab)