CVE-2026-7307

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-19. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
53%
KEV
Not listed

Published

May 19, 2026

Last Modified

August 27, 2026

Advisory Details (6)

Auto-updated Jun 11, 2026
Patch available. Sources: redhat.
redhat

2476526 – (CVE-2026-7307) CVE-2026-7307 keycloak: Keycloak: Denial of Service via specially crafted SAML input

https://bugzilla.redhat.com/show_bug.cgi?id=2476526
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-7307
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:19597
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:19596
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:19595
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:19594

Vendor Advisories for CVE-2026-7307(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhbk/keycloak-rhel9-operator:26.2-212026-05-20redhat
redhatrhbk/keycloak-rhel92026-05-20redhat
redhatrhbk/keycloak-rhel9-operator:26.4-172026-05-20redhat

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

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.keycloak:keycloak-saml-core1.1.0.Beta1 ... 9.0.3 (207 versions)26.6.2—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 37× 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 241 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-16 14:08 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-15 03:12 UTCEPSS rescore
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-08 22:01 UTCEPSS rescore
  9. 2026-09-06 13:48 UTCEPSS rescore
  10. 2026-09-04 05:07 UTCEPSS rescore
  11. 2026-09-02 14:12 UTCEPSS rescore
  12. 2026-09-01 13:54 UTCEPSS rescore
  13. 2026-09-01 04:40 UTCEPSS rescore
  14. 2026-09-01 04:40 UTCEPSS rescore
  15. 2026-08-30 19:18 UTCEPSS rescore
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 01:22 UTCEPSS rescore
  18. 2026-08-28 21:42 UTCEPSS rescore
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-27 13:02 UTCEG score recompute
  21. 2026-08-27 13:02 UTCVendor advisory
  22. 2026-08-26 17:45 UTCEG score recompute
  23. 2026-08-26 17:45 UTCVendor advisory
  24. 2026-08-26 16:07 UTCEG score recompute
  25. 2026-08-26 16:07 UTCVendor advisory
Show 75 more
  1. 2026-08-26 14:47 UTCEPSS rescore
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-24 14:18 UTCEPSS rescore
  4. 2026-08-23 17:08 UTCEG score recompute
  5. 2026-08-23 17:08 UTCVendor advisory
  6. 2026-08-23 00:19 UTCEPSS rescore
  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-21 23:39 UTCEG score recompute
  9. 2026-08-21 23:39 UTCVendor advisory
  10. 2026-08-20 22:56 UTCEPSS rescore
  11. 2026-08-20 19:05 UTCEG score recompute
  12. 2026-08-20 19:05 UTCVendor advisory
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-18 13:49 UTCEPSS rescore
  15. 2026-08-18 13:49 UTCEPSS rescore
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 10:02 UTCEG score recompute
  18. 2026-08-17 10:02 UTCVendor advisory
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 03:37 UTCEG score recompute
  22. 2026-08-16 03:37 UTCVendor advisory
  23. 2026-08-16 02:15 UTCEPSS rescore
  24. 2026-08-15 01:32 UTCEG score recompute
  25. 2026-08-15 01:32 UTCVendor advisory
  26. 2026-08-15 01:31 UTCEPSS rescore
  27. 2026-08-14 13:50 UTCVendor advisory
  28. 2026-08-14 02:08 UTCEG score recompute
  29. 2026-08-14 02:08 UTCVendor advisory
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 02:04 UTCVendor advisory
  32. 2026-08-12 14:22 UTCEG score recompute
  33. 2026-08-12 14:22 UTCVendor advisory
  34. 2026-08-12 13:51 UTCEPSS rescore
  35. 2026-08-12 01:38 UTCVendor advisory
  36. 2026-08-11 13:55 UTCEG score recompute
  37. 2026-08-11 13:55 UTCVendor advisory
  38. 2026-08-11 13:43 UTCEPSS rescore
  39. 2026-08-11 00:40 UTCEG score recompute
  40. 2026-08-11 00:40 UTCVendor advisory
  41. 2026-08-11 00:00 UTCEPSS rescore
  42. 2026-08-10 12:44 UTCVendor advisory
  43. 2026-08-10 01:02 UTCEG score recompute
  44. 2026-08-10 01:02 UTCVendor advisory
  45. 2026-08-09 13:47 UTCEPSS rescore
  46. 2026-08-09 13:19 UTCVendor advisory
  47. 2026-08-09 01:37 UTCEG score recompute
  48. 2026-08-09 01:37 UTCVendor advisory
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-08 08:00 UTCVendor advisory
  51. 2026-08-07 20:18 UTCEG score recompute
  52. 2026-08-07 20:18 UTCVendor advisory
  53. 2026-08-07 08:35 UTCVendor advisory
  54. 2026-08-06 20:48 UTCEG score recompute
  55. 2026-08-06 20:48 UTCVendor advisory
  56. 2026-08-06 13:47 UTCEPSS rescore
  57. 2026-08-06 09:05 UTCVendor advisory
  58. 2026-08-05 21:23 UTCEG score recompute
  59. 2026-08-05 21:23 UTCVendor advisory
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-05 19:17 UTCEPSS rescore
  62. 2026-08-04 15:10 UTCEPSS rescore
  63. 2026-08-04 10:39 UTCEPSS rescore
  64. 2026-08-04 04:42 UTCVendor advisory
  65. 2026-08-03 17:00 UTCEG score recompute
  66. 2026-08-03 17:00 UTCVendor advisory
  67. 2026-08-03 10:36 UTCEPSS rescore
  68. 2026-08-02 17:26 UTCVendor advisory
  69. 2026-08-02 05:44 UTCEG score recompute
  70. 2026-08-02 05:44 UTCVendor advisory
  71. 2026-08-02 02:27 UTCEPSS rescore
  72. 2026-08-01 18:01 UTCEG score recompute
  73. 2026-08-01 18:01 UTCVendor advisory
  74. 2026-08-01 04:16 UTCEPSS rescore
  75. 2026-07-30 16:28 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-7307?
CVE-2026-7307 is a high vulnerability published on May 19, 2026. A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server…
When was CVE-2026-7307 disclosed?
CVE-2026-7307 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7307 actively exploited?
CVE-2026-7307 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.8% of all scored CVEs.
What is the CVSS score of CVE-2026-7307?
CVE-2026-7307 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-7307?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7307, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-7307

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