UBUNTU-CVE-2026-22772

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Source
https://ubuntu.com/security/CVE-2026-22772
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22772.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-22772
Upstream
Published
2026-01-12T21:15:00Z
Modified
2026-01-20T17:25:43.172812Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:25.10 / golang-github-sigstore-fulcio

Package

Name
golang-github-sigstore-fulcio
Purl
pkg:deb/ubuntu/golang-github-sigstore-fulcio@1.6.5-1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.6.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.5-1",
            "binary_name": "golang-github-sigstore-fulcio-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22772.json"