🛡️ CVE-2026-22772
🟡 CVSS 5.8 — Medium ⚠️ Exploit Public CWE-918 NVD
5.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.5, Fulcio's metaRegex() function uses unanchored regex, allowing attackers to bypass MetaIssuer URL validation and trigger SSRF to arbitrary internal services. Since the SSRF only can trigger GET requests, the request cannot mutate state. The response from the GET request is not returned to the caller so data exfiltration is not possible. A malicious actor could attempt to probe an internal network through Blind SSRF. This vulnerability is fixed in 1.8.5.

Details

Severity MEDIUM
CVSS Score 5.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CWE CWE-918
Public Exploit ⚠️ Yes
Source NVD
Published 2026-01-12
Updated 2026-06-15
Modified 2026-03-05

Affected Packages

Software From version Fixed in
fulcio 1.8.5
github.com/sigstore/fulcio

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