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

No CVSS.

References

Link	Resource
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

Configurations

No configuration.

History

30 Sep 2026, 18:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 18:18

Updated : 2026-09-30 20:17

NVD link : CVE-2026-55094

Mitre link : CVE-2026-55094

CVE.ORG link : CVE-2026-55094

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

CWE-94

Improper Control of Generation of Code ('Code Injection')

CWE-95

Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

CWE-250

Execution with Unnecessary Privileges

CWE-306

Missing Authentication for Critical Function

{"id": "CVE-2026-55094", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55094", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-30T19:12:04.595464Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "taskcluster", "product": "taskcluster", "versions": [{"status": "affected", "version": "< 100.3.0"}]}]}], "published": "2026-09-30T18:18:37.387", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2045091", "source": "security-advisories@github.com"}, {"url": "https://github.com/taskcluster/taskcluster/commit/a1b0154b8235937657c2ded127f193b564e2334b", "source": "security-advisories@github.com"}, {"url": "https://github.com/taskcluster/taskcluster/issues/8716", "source": "security-advisories@github.com"}, {"url": "https://github.com/taskcluster/taskcluster/pull/8718", "source": "security-advisories@github.com"}, {"url": "https://github.com/taskcluster/taskcluster/releases/tag/v100.3.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/taskcluster/taskcluster/security/advisories/GHSA-ccv5-c45x-2q38", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-95"}, {"lang": "en", "value": "CWE-250"}, {"lang": "en", "value": "CWE-306"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-30T20:17:32.590", "sourceIdentifier": "security-advisories@github.com"}