CVE-2026-74970
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-74970 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation even though it is not (yet) in the CISA KEV catalog.
An attacker can exploit multiple vulnerabilities in Mozilla Firefox, Firefox ESR and Thunderbird to elevate privileges, bypass security measures, disclose confidential information, perform spoofing or clickjacking attacks, or cause denial-of-service conditions.
CSIRTS triage
- What
- Multiple vulnerabilities allow attackers to elevate privileges, bypass security measures, disclose information, perform spoofing or clickjacking, or cause denial-of-service.
- Who is affected
- All users of Firefox, Firefox ESR, and Thunderbird.
- Urgency
- High severity requires prompt patching; currently not known to be exploited in the wild.
- Action
- Update to the latest patched version of Firefox, Firefox ESR, or Thunderbird.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2026-74970
Get an email if CVE-2026-74970 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Low exploitation risk0.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-74970 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (4)
- high[NEW] [high] Mozilla Firefox, Firefox ESR and Thunderbird: Multiple Vulnerabilitiescert-bund · 2026-08-19
- unknownMozilla Products Multiple Vulnerabilitieshkcert · 2026-08-19
- unknownMultiple vulnerabilities in Mozilla products (August 19, 2026)cert-fr-avis · 2026-08-19
- mediumCVE-2026-74970: Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 154, F…nvd · 2026-08-18
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2026-74970)