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CVE-2026-22772

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:15cd0d3a6fc85509d5260b78310250a901d26fd54e3ce6d1c47fc66babba9523
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"fulcio","vendor":"sigstore","versions":[{"status":"affected","version":"< 1.8.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:07ea13c643debacd3f50b54c08c08eadf3824f1e151d8add154523748a7bb72a · sha256:b2cd1806361c9f0d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:07ea13c643debacd3f50b54c08c08eadf3824f1e151d8add154523748a7bb72a · sha256:b2cd1806361c9f0d… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:07ea13c643debacd3f50b54c08c08eadf3824f1e151d8add154523748a7bb72a · sha256:b2cd1806361c9f0d… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/sigstore/fulcio/commit/eaae2f2be56df9dea5f9b439ec81bedae4c0978d","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/fulcio/commit/eaae2f2be56df9dea5f9b439ec81bedae4c0978d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:07ea13c643debacd3f50b54c08c08eadf3824f1e151d8add154523748a7bb72a · sha256:b2cd1806361c9f0d… · /containers/cna/references/1
{"name":"https://github.com/sigstore/fulcio/security/advisories/GHSA-59jp-pj84-45mr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sigstore/fulcio/security/advisories/GHSA-59jp-pj84-45mr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:07ea13c643debacd3f50b54c08c08eadf3824f1e151d8add154523748a7bb72a · sha256:b2cd1806361c9f0d… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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