CVE-2026-16089

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 96% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in the keycloak-services component of Red Hat Build of Keycloak. The issue occurs because OAuth 2.0 authorization codes are not properly bound to the client that originally requested them. An attacker who can intercept an authorization code can modify it to be redeemed by their own client, potentially allowing them to obtain access tokens for a victim's identity.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

July 17, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Jul 17, 2026
Patch available. Sources: redhat.
redhat

2501724 – (CVE-2026-16089) CVE-2026-16089 keycloak-services: keycloak-services: Authorization codes can be retargeted to another client session

https://bugzilla.redhat.com/show_bug.cgi?id=2501724
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16089

Vendor Advisories for CVE-2026-16089(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 66× 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 763 total refreshes for this CVE.

  1. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-11 09:36 UTCEPSS rescore
  3. 2026-09-10 09:34 UTCEPSS rescore
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-08 00:01 UTCEG score recompute
  6. 2026-09-08 00:01 UTCGHSA enrichment
  7. 2026-09-07 16:01 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-05 20:27 UTCEG score recompute
  10. 2026-09-05 20:27 UTCGHSA enrichment
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:11 UTCEPSS rescore
  13. 2026-09-01 13:53 UTCEPSS rescore
  14. 2026-09-01 04:39 UTCEPSS rescore
  15. 2026-08-31 15:39 UTCGHSA enrichment
  16. 2026-08-31 12:28 UTCGHSA enrichment
  17. 2026-08-31 11:40 UTCGHSA enrichment
  18. 2026-08-31 05:21 UTCEG score recompute
  19. 2026-08-31 05:21 UTCGHSA enrichment
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 03:19 UTCEG score recompute
  22. 2026-08-30 03:19 UTCGHSA enrichment
  23. 2026-08-30 01:22 UTCEPSS rescore
  24. 2026-08-28 21:41 UTCEPSS rescore
  25. 2026-08-28 02:49 UTCEG score recompute
Show 75 more
  1. 2026-08-28 02:49 UTCGHSA enrichment
  2. 2026-08-27 14:25 UTCEPSS rescore
  3. 2026-08-27 00:49 UTCEG score recompute
  4. 2026-08-27 00:49 UTCGHSA enrichment
  5. 2026-08-26 14:46 UTCEPSS rescore
  6. 2026-08-25 22:48 UTCEG score recompute
  7. 2026-08-25 22:48 UTCGHSA enrichment
  8. 2026-08-25 13:48 UTCEPSS rescore
  9. 2026-08-24 20:17 UTCEG score recompute
  10. 2026-08-24 20:17 UTCGHSA enrichment
  11. 2026-08-23 18:16 UTCEG score recompute
  12. 2026-08-23 18:16 UTCGHSA enrichment
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-22 16:16 UTCEG score recompute
  15. 2026-08-22 16:16 UTCGHSA enrichment
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-21 14:15 UTCEG score recompute
  18. 2026-08-21 14:15 UTCGHSA enrichment
  19. 2026-08-20 22:55 UTCEPSS rescore
  20. 2026-08-20 12:15 UTCEG score recompute
  21. 2026-08-20 12:15 UTCGHSA enrichment
  22. 2026-08-19 17:03 UTCEPSS rescore
  23. 2026-08-19 09:54 UTCEG score recompute
  24. 2026-08-19 09:54 UTCGHSA enrichment
  25. 2026-08-18 13:48 UTCEPSS rescore
  26. 2026-08-18 07:54 UTCEG score recompute
  27. 2026-08-18 07:54 UTCGHSA enrichment
  28. 2026-08-17 13:47 UTCEPSS rescore
  29. 2026-08-17 05:52 UTCEG score recompute
  30. 2026-08-17 05:52 UTCGHSA enrichment
  31. 2026-08-16 14:56 UTCEPSS rescore
  32. 2026-08-16 03:11 UTCEG score recompute
  33. 2026-08-16 03:11 UTCGHSA enrichment
  34. 2026-08-16 02:14 UTCEPSS rescore
  35. 2026-08-15 01:30 UTCEPSS rescore
  36. 2026-08-15 01:11 UTCGHSA enrichment
  37. 2026-08-13 23:11 UTCEG score recompute
  38. 2026-08-13 23:11 UTCGHSA enrichment
  39. 2026-08-13 22:00 UTCEPSS rescore
  40. 2026-08-12 21:11 UTCEG score recompute
  41. 2026-08-12 21:11 UTCGHSA enrichment
  42. 2026-08-12 13:50 UTCEPSS rescore
  43. 2026-08-11 19:07 UTCEG score recompute
  44. 2026-08-11 19:07 UTCGHSA enrichment
  45. 2026-08-11 13:42 UTCEPSS rescore
  46. 2026-08-11 00:00 UTCEPSS rescore
  47. 2026-08-10 17:05 UTCGHSA enrichment
  48. 2026-08-09 15:05 UTCEG score recompute▲ 0.50
  49. 2026-08-09 15:05 UTCGHSA enrichment
  50. 2026-08-09 15:05 UTCNVD updateCVSS v3 → 5.9
  51. 2026-08-09 14:11 UTCEG score recompute
  52. 2026-08-09 14:11 UTCGHSA enrichment
  53. 2026-08-09 13:46 UTCEPSS rescore
  54. 2026-08-08 16:37 UTCEPSS rescore
  55. 2026-08-08 12:11 UTCEG score recompute
  56. 2026-08-08 12:11 UTCGHSA enrichment
  57. 2026-08-07 10:10 UTCEG score recompute
  58. 2026-08-07 10:10 UTCGHSA enrichment
  59. 2026-08-06 13:46 UTCEPSS rescore
  60. 2026-08-06 08:10 UTCEG score recompute
  61. 2026-08-06 08:10 UTCGHSA enrichment
  62. 2026-08-05 19:17 UTCEPSS rescore
  63. 2026-08-05 06:10 UTCEG score recompute
  64. 2026-08-05 06:10 UTCGHSA enrichment
  65. 2026-08-04 15:10 UTCEPSS rescore
  66. 2026-08-04 10:38 UTCEPSS rescore
  67. 2026-08-04 03:23 UTCEG score recompute
  68. 2026-08-04 03:23 UTCGHSA enrichment
  69. 2026-08-03 10:35 UTCEPSS rescore
  70. 2026-08-03 01:23 UTCEG score recompute
  71. 2026-08-03 01:23 UTCGHSA enrichment
  72. 2026-08-02 02:26 UTCEPSS rescore
  73. 2026-08-01 23:23 UTCEG score recompute
  74. 2026-08-01 23:23 UTCGHSA enrichment
  75. 2026-08-01 04:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-16089?
CVE-2026-16089 is a medium vulnerability published on July 17, 2026. A flaw was found in the keycloak-services component of Red Hat Build of Keycloak. The issue occurs because OAuth 2.0 authorization codes are not properly bound to the client that originally requested them. An attacker who can intercept an authorization code can modify it to be redeemed by their own…
When was CVE-2026-16089 disclosed?
CVE-2026-16089 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16089 actively exploited?
CVE-2026-16089 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 96.2% of all scored CVEs.
What is the CVSS score of CVE-2026-16089?
CVE-2026-16089 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-16089?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16089, 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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