CVE-2026-92038 is a mitigation-bypass vulnerability in Mozilla's Remote Settings Client component. Mozilla corrected the issue in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. Technical details of the bypass mechanism and affected code path are not currently available.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability covered by the Mozilla Thunderbird 156.0 update; no individual technical details are provided.
A vulnerability referenced in the Mozilla Thunderbird 156.0 security advisory; no technical details are provided.
A critical, remotely exploitable Ubuntu Linux vulnerability affecting listed Ubuntu LTS releases and Mozilla JavaScript (mozjs) packages, with network access, low attack complexity, no privileges or user interaction required, and high confidentiality, integrity, and availability impact according to the supplied CVSS v3 vector.
A vulnerability referenced by the Thunderbird 153.3 security update; no technical details are provided in the content.
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.