Mitigation bypass in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 158.
Summary
Vulnerability reported (CVE-2026-109780). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Mitigation bypass in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 158.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2026-109780 was discovered in the affected product.
Severity is Info. Low severity or not yet rated.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "the product CVE-2026-109780".
CVE-2026-109780 (the affected product). Severity: Info.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2026-109780) in the affected product. A serious software flaw has been identified.
Target versions of the affected product (see vendor advisory). If running in production, identify exposure immediately.
Severity: Info. Low severity or not yet rated.
Update to the patched release as listed in the vendor advisory.
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
References
- web bugzilla.mozilla.org
- web security@mozilla.org
- web nvd.nist.gov
- web mozilla.org
- web github.com
- web security@mozilla.org
- web mozilla.org