golang-github-sigstore-fulcio: Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) iden...
CVE-2025-66506 is fixed in 9 products on 1 platform, first by DEBIAN-CVE-2025-66506, released December 4, 2025. It is not reported as exploited. Patch Radar priority: 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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| golang-github-sigstore-fulcio · Debian 14 | 1.8.5-1 | DEBIAN-CVE-2025-66506 | Dec 4, 2025 |
| govulncheck-vulndb · opensuse-leap 15.6 | 0.0.20251209T172047-150000.1.127.1 | SUSE-SU-2025:4395-1 | Dec 15, 2025 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
| govulncheck-vulndb · sles 15.6 | 0.0.20251209T172047-150000.1.127.1 | SUSE-SU-2025:4395-1 | Dec 15, 2025 |
| podman-tui · Fedora 43 | 1.11.3-1.fc43 | FEDORA-2026-1842AAEA5D | Jun 28, 2026 |
| podman-tui-debuginfo · Fedora 43 | 1.11.3-1.fc43 | FEDORA-2026-1842AAEA5D | Jun 28, 2026 |
| podman-tui-debugsource · Fedora 43 | 1.11.3-1.fc43 | FEDORA-2026-1842AAEA5D | Jun 28, 2026 |
| prometheus-podman-exporter · Fedora 43 | 1.21.2-1.fc43 | FEDORA-2026-A96D4EE174 | Jun 28, 2026 |
| prometheus-podman-exporter-debuginfo · Fedora 43 | 1.21.2-1.fc43 | FEDORA-2026-A96D4EE174 | Jun 28, 2026 |
| prometheus-podman-exporter-debugsource · Fedora 43 | 1.21.2-1.fc43 | FEDORA-2026-A96D4EE174 | Jun 28, 2026 |
| runfinch-finch · amzn 2023 | 1.10.0-1.amzn2023.0.6 | ALAS2023-2025-1336 | Jan 7, 2026 |
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