CVE Record
[ HIGH ]CVE-2022-26485
Mozilla Firefox Use-After-Free Vulnerability
Mozilla Firefox contains a use-after-free vulnerability in XSLT parameter processing which can be exploited to perform arbitrary code execution.
- Vendor
- Mozilla
- Product
- Firefox
- CVSS
- 8.8
- EPSS (exploit probability)
- 14.3%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2022-26485 being exploited?
Yes. CISA added CVE-2022-26485 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 14.3% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-19. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (14 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Mozilla Firefox CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-15719 Firefox DOM Navigation site-isolation flaw with public exploit codewrite-up | [ MEDIUM ] | 5.4 | 0.3% | — |
| CVE-2026-15718 Firefox JavaScript/WebAssembly invalid pointer with public exploit codewrite-up | [ MEDIUM ] | 4.3 | 0.5% | — |
| CVE-2026-10702 JIT miscompilation in Firefox JavaScript engine allows renderer code executionwrite-up | [ MEDIUM ] | 4.3 | 0.9% | — |
| CVE-2024-9680 Mozilla Firefox Use-After-Free Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 23.2% | |
| CVE-2015-4495 Mozilla Firefox Security Feature Bypass Vulnerability | [ HIGH ] | 8.8 | 68.6% | |
| CVE-2022-26486 Mozilla Firefox Use-After-Free Vulnerability | [ CRITICAL ] | 9.6 | 2.4% | |
| CVE-2013-1675 Mozilla Firefox Information Disclosure Vulnerability | [ MEDIUM ] | 6.5 | 6.7% |