CVE-2026-50623

MEDIUMPre-NVD 4.86.5▲
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.8; sources differ by 1.7.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

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

An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that this is a safeguard only in the case that someone forgot to enable authentication on the service. Users are recommended to upgrade to version 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.

CVSS v3
4.8
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

June 12, 2026

Last Modified

August 7, 2026

Advisory Details (2)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-50623: Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService

http://www.openwall.com/lists/oss-security/2026/06/11/3
generic
https://lists.apache.org/thread/ydzj8m5mqmjy13xgyj9mkk9hfff63qq7

Vendor Advisories for CVE-2026-50623(1)

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

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.cxf:cxf-rt-rs-security-oauth24.2.0, 4.2.14.2.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 67× 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 178 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-50623?
CVE-2026-50623 is a medium vulnerability published on June 12, 2026. An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that…
When was CVE-2026-50623 disclosed?
CVE-2026-50623 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50623 actively exploited?
CVE-2026-50623 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 71.5% of all scored CVEs.
What is the CVSS score of CVE-2026-50623?
CVE-2026-50623 has a CVSS v3.1 base score of 4.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5.
How do I remediate CVE-2026-50623?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50623, 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-2026-50623

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