CVE-2026-55094
Description
Taskcluster is the task execution framework that supports Mozilla's continuous integration and release processes. Prior to version 100.3.0, Taskcluster is vulnerable to unauthenticated RCE on Taskcluster deployments with an anonymous role that exposes the GraphQL endpoint and parses filter arguments using the sift library. This issue has been patched in version 100.3.0.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2045091
- https://github.com/taskcluster/taskcluster/commit/a1b0154b8235937657c2ded127f193b564e2334b
- https://github.com/taskcluster/taskcluster/issues/8716
- https://github.com/taskcluster/taskcluster/pull/8718
- https://github.com/taskcluster/taskcluster/releases/tag/v100.3.0
- https://github.com/taskcluster/taskcluster/security/advisories/GHSA-ccv5-c45x-2q38
CWEs
CWE-20 CWE-94 CWE-95 CWE-250 CWE-306
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.