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CVE-2026-100770 is a use-after-free vulnerability in Mozilla Firefox's DOM Content Processes component that can enable escape from the Firefox content-process sandbox. It is fixed in Firefox 157 and Firefox ESR 153.4, 115.42, and 140.17.
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No public exploit code observed for this vulnerability.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A network-accessible vulnerability tracked as CVE-2026-100770, identified by an unpatched-vulnerability Nessus plugin for Debian Linux 12.0, 13.0, and 14.0 systems, including Firefox ESR package coverage. The listed CVSS v3 vector indicates low-complexity exploitation requiring user interaction, with high confidentiality, integrity, and availability impact and a changed scope.
A use-after-free vulnerability in Firefox's DOM Content Processes component that could enable a sandbox escape.
A vulnerability addressed by a Slackware Mozilla Firefox package update; no technical vulnerability details are provided.
A Mozilla Firefox ESR vulnerability referenced by the plugin; no technical details are provided.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.