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Mozilla Firefox 151.0.3 security update for CVE-2026-10702

Security Patch Release
First reported
Last updated
Happening score
H score 30
1 unique sources, 1 articles

Summary

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Mozilla released Firefox 151.0.3 to fix CVE-2026-10702, a High-severity browser flaw that could be triggered by visiting a malicious webpage. The update closes an arbitrary-code-execution issue in Firefox that affected stable releases through 151.0.2 and downstream Tor Browser builds based on vulnerable Firefox versions. Mozilla's patch removes the faulty alias handling that let the browser retain a stale pointer after optimization.

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Timeline

  1. 29.07.2026 14:57 2 articles · 2h ago

    Mozilla releases Firefox 151.0.3 to fix CVE-2026-10702

    Mitigation Patch Update

    Mozilla released Firefox 151.0.3 to fix CVE-2026-10702, a High-severity Firefox JIT flaw that could be triggered by visiting a malicious webpage and could execute arbitrary code inside the browser's renderer process. Nebula Security said vulnerable Tor Browser releases were also affected, and Mozilla's fix removed the faulty alias handling that let the optimiser keep a stale pointer.

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