CVE-2026-55094

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWEs

CWE-20, CWE-94, CWE-95, CWE-250, CWE-306

Published

2026-09-30

Modified

2026-09-30

Record from

the NVD, synced 2026-10-19

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

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