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CVE-2026-100785 is a use-after-free vulnerability in the DOM: Core & HTML component of Mozilla Firefox. It affects Firefox releases before version 157 and specified Firefox ESR release lines before ESR 153.4, ESR 115.42, and ESR 140.17.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability identified as CVE-2026-100785 affecting Debian Linux 12.0, 13.0, and 14.0, with Firefox ESR also listed in the affected-product CPE information. It has a CVSS v3 vector of CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
A use-after-free vulnerability in Firefox's DOM: Core & HTML component.
A security vulnerability addressed in Mozilla Firefox ESR.
A vulnerability addressed by the Mozilla Firefox ESR 115.42 update; no technical flaw 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.