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CVE-2026-100771 is an undefined-behavior vulnerability in Mozilla Firefox's DOM: Streams component. It is fixed in Firefox 157 and Firefox ESR 153.4, 140.17, and 115.42.
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Patch, then assume compromise.
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 critical, remotely exploitable vulnerability tracked as CVE-2026-100771. The supplied CVSS v3 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) indicates unauthenticated network exploitation with low complexity and complete impact to confidentiality, integrity, and availability. It is listed against Debian Linux 12.0, 13.0, and 14.0, including the firefox-esr package CPE.
An undefined-behavior vulnerability in Firefox's DOM: Streams component.
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.