CVE-2026-22772

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Source
https://nvd.nist.gov/vuln/detail/CVE-2026-22772
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22772.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-22772
Aliases
Downstream
Related
Published
2026-01-12T20:58:53.659Z
Modified
2026-01-23T02:55:55.103086Z
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
Summary
Fulcio vulnerable to Server-Side Request Forgery (SSRF) via MetaIssuer Regex Bypass
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.

Database specific 
{
    "cwe_ids": [
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22772.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/sigstore/fulcio

Affected ranges

Type
GIT
Repo
https://github.com/sigstore/fulcio
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
eaae2f2be56df9dea5f9b439ec81bedae4c0978d

Affected versions

0.*

0.1.0

v0.*

v0.1.1
v0.2.0
v0.3.0
v0.4.0
v0.4.1
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.5.4
v0.6.0

v1.*

v1.0.0
v1.0.0-rc.0
v1.1.0
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.7.0
v1.7.1
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22772.json"