CVE-2022-26485VulnerabilityPublished 03/07/2022Updated 10/24/2026

CVE-2022-26485: Mozilla Firefox Use-After-Free Vulnerability

Affects Mozilla FirefoxSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/07/2022
KEV deadline: 03/21/2022
EPSS: 14.3% chance of exploitation in 30 days – higher than 96% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2022-26485 (opens in a new tab)

Description

CVE-2022-26485 is a use-after-free vulnerability in Mozilla Firefox's XSLT parameter processing. This flaw can be exploited to achieve arbitrary code execution. The vulnerability has been observed in the wild, indicating active exploitation. No specific affected versions or patch information is provided in the input data.

Summary

Mozilla Firefox contains a use-after-free vulnerability identified as CVE-2022-26485 in the processing of XSLT parameters. This vulnerability allows attackers to exploit the flaw to execute arbitrary code within the context of the browser. The vulnerability is classified under CWE-416 (Use After Free). It has been reported as actively exploited in the wild. No explicit patch or remediation details are included in the provided data.

Impact

Successful exploitation of this vulnerability can lead to arbitrary code execution within the Firefox browser, potentially allowing attackers to execute malicious code on affected systems. The vulnerability has been exploited in the wild, increasing the risk to users running vulnerable versions of Firefox.

Mitigation

Patch status is not yet confirmed — check the Mozilla vendor advisory for current remediation guidance. Users should monitor official Mozilla security advisories and apply updates promptly once patches are released.

Weaknesses

CWE-416Use After Free (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:42:07 UTC

Weaknesses

References

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