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Date	Provider	Score	Summary
11 Aug 2026, 7:36 PM	The Register	4.5	Mozilla revokes Firefox signing key after unencrypted copy lands in GitHub Mozilla revoked a GPG private subkey used to sign Firefox and Thunderbird Linux releases after an unencrypted copy was accidentally committed to a private GitHub repo accessible to a small number of employees. Audit logs showed no evidence of unauthorized access, but Mozilla did not disclose how the key landed in GitHub or how long it was exposed. Users manually verifying GPG signatures or running Firefox via Mozilla's RPM repo on Fedora 42 or earlier, RHEL, Rocky, AlmaLinux, openSUSE, or SUSE must manually remove the old key and import its replacement. Why: If you verify Firefox/Thunderbird signatures on Linux or manage RPM-based deployments on older distros, you need to swap keys now—older signed releases will fail verification after importing the revocation. For everyone else, this is a reminder that private signing keys in source control—even private repos with authorized personnel—is a real failure mode that happened to a major project, and Mozilla's silence on duration and cause means you can't assume their exposure window was trivial. security key-management secrets-in-source-control firefox linux

Date

Provider

Score

Summary

11 Aug 2026, 7:36 PM

The Register

4.5

Mozilla revokes Firefox signing key after unencrypted copy lands in GitHub

Mozilla revoked a GPG private subkey used to sign Firefox and Thunderbird Linux releases after an unencrypted copy was accidentally committed to a private GitHub repo accessible to a small number of employees. Audit logs showed no evidence of unauthorized access, but Mozilla did not disclose how the key landed in GitHub or how long it was exposed. Users manually verifying GPG signatures or running Firefox via Mozilla's RPM repo on Fedora 42 or earlier, RHEL, Rocky, AlmaLinux, openSUSE, or SUSE must manually remove the old key and import its replacement.

Why: If you verify Firefox/Thunderbird signatures on Linux or manage RPM-based deployments on older distros, you need to swap keys now—older signed releases will fail verification after importing the revocation. For everyone else, this is a reminder that private signing keys in source control—even private repos with authorized personnel—is a real failure mode that happened to a major project, and Mozilla's silence on duration and cause means you can't assume their exposure window was trivial.