CVE-2026-22772

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.2% (13th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

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
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

January 12, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 9, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
golang-github-sigstore-fulcio1.6.5-1, 1.7.1-1, 1.8.5-1, 1.8.7-1, 1.8.8-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-sigstore-fulcio1.6.5-1, 1.7.1-1
  • every version up to 1.8.5-1: fixed in 1.8.5-1
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/sigstore/fulcio—
  • every version up to 1.8.5: fixed in 1.8.5
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 30× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 92 of 176 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 8 repeat rows among the latest 100 are merged into the row they repeat. The 84 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-10-12 16:22 UTCEG score recompute
  6. 2026-10-11 20:03 UTCEG score recompute
  7. 2026-10-11 17:17 UTCEG score recompute
  8. 2026-10-11 14:48 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-08 22:25 UTCOSV refresh
  13. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-09-29 15:21 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.2% · 12th percentile
Show 67 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-09-19 05:00 UTCOSV refresh
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-08-31 08:25 UTCOSV refresh
  18. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  27. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  28. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  29. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  30. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  31. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  32. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  33. 2026-08-14 14:52 UTCEG score recompute
  34. 2026-08-14 14:52 UTCVendor advisory
  35. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  36. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  37. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  38. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  39. 2026-08-09 20:30 UTCEG score recompute
  40. 2026-08-09 20:30 UTCVendor advisory
  41. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  42. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  43. 2026-08-08 01:01 UTCEG score recompute
  44. 2026-08-08 01:01 UTCVendor advisory
  45. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  46. 2026-08-06 05:59 UTCEG score recompute▼ 0.50
  47. 2026-08-06 05:59 UTCVendor advisory
  48. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  50. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  51. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  52. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  53. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  54. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  55. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  56. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  57. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  58. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  59. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  60. 2026-07-23 10:49 UTCOSV refresh
  61. 2026-07-23 03:06 UTCEG score recompute
  62. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  63. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  64. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  65. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  66. 2026-07-19 02:28 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  67. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile

Related CVEs(same product + same vendor + same CWE)

Same product

2 shown

Debian:13:golang-github-sigstore-fulcio

Frequently asked(5)

What is CVE-2026-22772?
CVE-2026-22772 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-22772 published?
The CVE record for CVE-2026-22772 was published on January 12, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-22772 actively exploited?
CVE-2026-22772 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-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?
A fix for CVE-2026-22772 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-22772 are linked in the Vendor Advisories panel on this page.

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