CVE-2026-55094
Description
A flaw was found in Taskcluster. This vulnerability allows an unauthenticated remote attacker to achieve arbitrary code execution. When a deployment exposes its GraphQL endpoint to anonymous access, user-supplied filter parameters are unsafely evaluated by the backend filtering library. A remote attacker can exploit this by sending crafted filter queries to execute arbitrary commands on the underlying server.
Statement
This vulnerability is rated as an Important severity flaw because an unauthenticated network attacker could potentially execute arbitrary code on the host, though exploitation requires exposing the GraphQL endpoint to anonymous users. Red Hat does not ship or support Taskcluster in any Red Hat Enterprise Linux or core product offerings. Consequently, standard Red Hat environments are not directly affected by this flaw.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
In some cases, injectable code controls authentication; this may lead to a remote vulnerability.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Injected code can access resources that the attacker is directly prevented from accessing.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
When a product allows a user's input to contain code syntax, it might be possible for an attacker to craft the code in such a way that it will alter the intended control flow of the product. As a result, code injection can often result in the execution of arbitrary code. Code injection attacks can also lead to loss of data integrity in nearly all cases, since the control-plane data injected is always incidental to data recall or writing.
Non-Repudiation
Technical Impact: Hide Activities
Often the actions performed by injected control code are unlogged.
Frequently Asked Questions
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