CVE-2026-15573

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. A secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should not have permission to see.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
Patch available. Sources: redhat.
redhat

2499593 – (CVE-2026-15573) CVE-2026-15573 keycloak-services: keycloak-services: Authorization bypass via unnormalized URI matching in PathMatcher

https://bugzilla.redhat.com/show_bug.cgi?id=2499593
redhat Patch Available

CVE-2026-15573 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-15573

Vendor Advisories for CVE-2026-15573(5)

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 / EcosystemFix (by version range) / PatchReleasedSource
redhatrhbk/keycloak-rhel9-operator:26.6-112026-08-05redhat
redhatrhbk-openshift-rhel9/rhbk-openshift-rhel92026-08-05redhat
redhatrhbk/keycloak-rhel9-operator:26.4-222026-08-05redhat

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.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 125× 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 317 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-15573?
CVE-2026-15573 is a high vulnerability published on August 5, 2026. A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick…
When was CVE-2026-15573 disclosed?
CVE-2026-15573 was first published on August 5, 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-2026-15573 actively exploited?
CVE-2026-15573 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15573?
CVE-2026-15573 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15573?
A fix for CVE-2026-15573 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-15573 are linked in the Vendor Advisories panel on this page.

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