CVEvulnerability

CVE-2025-66506

7.5 HIGH Published 2025-12-04 Modified 2026-10-18 Official page ↗
Status
Analyzed
Published
2025-12-04
Last modified
2026-10-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-405

Description

Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.3, function identity.extractIssuerURL splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request with an (invalid) OIDC identity token in the payload containing many period characters, a call to extractIssuerURL incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This vulnerability is fixed in 1.8.3.

Affected configurations

• linuxfoundation fulcio (< 1.8.3)

Related

Weakness · CWE (1)

  • CWE-405 Asymmetric Resource Consumption (Amplification) weakness

References