DEBIAN-CVE-2026-22772

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-22772
Published: 12 Jan 2026, 21:15
Last modified:28 Apr 2026, 20:31

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Jan 2026, 21:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:31
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Systems

  • debian•golang-github-sigstore-fulcio

    all | all | < 1.8.5-1

References (1)