CVE-2026-22772

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 87% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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 v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

January 12, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 9, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Server-Side Request Forgery (SSRF) via MetaIssuer Regex Bypass · Advisory · sigstore/fulcio · GitHub

https://github.com/sigstore/fulcio/security/advisories/GHSA-59jp-pj84-45mr
github_commit

commit eaae2f2be56d (sigstore/fulcio)

Fix landed in sigstore/fulcio commit eaae2f2be56d — awaiting tagged release

https://github.com/sigstore/fulcio/commit/eaae2f2be56df9dea5f9b439ec81bedae4c0978d

Vendor Advisories for CVE-2026-22772(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatodf4/rook-ceph-rhel9-operator:17829342842026-07-09redhat
redhatrhtas/gitsign-rhel9:17707342832026-02-18redhat
redhatrhtas/client-server-rhel9:17707897922026-02-18redhat
redhatrhtas/gitsign-rhel9:17701081932026-02-05redhat
redhatrhtas/fulcio-rhel9:17701074462026-02-05redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
golang-github-sigstore-fulcio1.6.5-1, 1.7.1-1, 1.8.5-1, 1.8.7-1, 1.8.8-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
golang-github-sigstore-fulcio1.6.5-1, 1.7.1-11.8.5-1—
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/sigstore/fulcio—1.8.5—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 36× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 142 total refreshes for this CVE.

  1. 2026-08-31 08:25 UTCOSV refresh
  2. 2026-08-30 19:17 UTCEPSS rescore
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 14:25 UTCEPSS rescore
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  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 01:30 UTCEPSS rescore
  17. 2026-08-14 14:52 UTCEG score recompute
  18. 2026-08-14 14:52 UTCVendor advisory
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-12 13:50 UTCEPSS rescore
  21. 2026-08-11 13:42 UTCEPSS rescore
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-09 20:30 UTCEG score recompute
  24. 2026-08-09 20:30 UTCVendor advisory
  25. 2026-08-09 13:46 UTCEPSS rescore
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  1. 2026-08-08 16:37 UTCEPSS rescore
  2. 2026-08-08 01:01 UTCEG score recompute
  3. 2026-08-08 01:01 UTCVendor advisory
  4. 2026-08-06 13:46 UTCEPSS rescore
  5. 2026-08-06 05:59 UTCEG score recompute▼ 0.50
  6. 2026-08-06 05:59 UTCVendor advisory
  7. 2026-08-05 19:17 UTCEPSS rescore
  8. 2026-08-04 15:10 UTCEPSS rescore
  9. 2026-08-04 10:38 UTCEPSS rescore
  10. 2026-08-03 10:35 UTCEPSS rescore
  11. 2026-08-02 02:26 UTCEPSS rescore
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  20. 2026-07-23 14:18 UTCEPSS rescore
  21. 2026-07-23 14:18 UTCEPSS rescore
  22. 2026-07-23 10:49 UTCOSV refresh
  23. 2026-07-23 03:06 UTCEG score recompute
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-21 15:24 UTCEPSS rescore
  26. 2026-07-21 15:24 UTCEPSS rescore
  27. 2026-07-20 17:08 UTCEPSS rescore
  28. 2026-07-19 14:31 UTCEPSS rescore
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  30. 2026-07-19 02:29 UTCEPSS rescore
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  40. 2026-07-13 06:13 UTCEPSS rescore
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  42. 2026-07-12 05:46 UTCEPSS rescore
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  44. 2026-07-11 08:27 UTCEPSS rescore
  45. 2026-07-09 19:10 UTCEPSS rescore
  46. 2026-07-08 15:15 UTCEPSS rescore
  47. 2026-07-08 15:15 UTCEPSS rescore
  48. 2026-07-07 13:46 UTCEPSS rescore
  49. 2026-07-06 16:27 UTCEPSS rescore
  50. 2026-07-06 16:27 UTCEPSS rescore
  51. 2026-07-06 06:02 UTCOSV refresh
  52. 2026-07-06 02:23 UTCEPSS rescore
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  54. 2026-07-05 02:30 UTCEPSS rescore
  55. 2026-07-04 06:31 UTCEPSS rescore
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  65. 2026-06-27 03:08 UTCEPSS rescore
  66. 2026-06-25 13:49 UTCEPSS rescore
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  68. 2026-06-24 14:05 UTCEPSS rescore
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  70. 2026-06-23 21:33 UTCEPSS rescore
  71. 2026-06-23 21:32 UTCEPSS rescore
  72. 2026-06-22 14:25 UTCEPSS rescore
  73. 2026-06-22 14:25 UTCEPSS rescore
  74. 2026-06-21 14:56 UTCEPSS rescore
  75. 2026-06-21 14:56 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-22772?
CVE-2026-22772 is a medium vulnerability published on January 12, 2026. 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…
When was CVE-2026-22772 disclosed?
CVE-2026-22772 was first published in the National Vulnerability Database on January 12, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22772 actively exploited?
CVE-2026-22772 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.1% of all scored CVEs.
What is the CVSS score of CVE-2026-22772?
CVE-2026-22772 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-22772?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22772, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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