CVE-2026-16089

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% 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 — Patch released 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

A fix is available — apply it.

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
8%
KEV
Not listed

Published

July 17, 2026

Last Modified

September 16, 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(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhbk/keycloak-rhel9-operator:26.6-202026-09-16redhat
redhatrhbk-openshift-rhel9/rhbk-openshift-rhel92026-09-16redhat

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.

Weakness Classification(2)

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

Additional Vendor Advisories

(1)

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 17× in last 7d / 65× 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 782 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 September 16, 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 92.3% 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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