VDB
DEBIAN-CVE-2025-66506
DEBIAN-CVE-2025-66506
PUBLISHED
CVSS 7.5 HIGH
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.
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | golang-github-sigstore-fulcio | 0, 1.6.5-1, 1.7.1-1 |
| Debian:13 | golang-github-sigstore-fulcio | 1.7.1-1, 0, 1.8.5-1 |
Timeline
- Dec 4, 2025 CVE Published
- Apr 28, 2026 CVE Updated