CVE-2026-5430

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-06. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access.

Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 10, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

Security Advisory WSO2-2026-5328/CVE-2026-5430 - WSO2 Security and Compliance Documentation

https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/

Vendor Advisories for CVE-2026-5430(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 55× in last 7d / 124× 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 124 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-5430?
CVE-2026-5430 is a critical vulnerability published on August 6, 2026. The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access. Successful exploitation of this…
When was CVE-2026-5430 disclosed?
CVE-2026-5430 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5430 actively exploited?
CVE-2026-5430 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 86.8% of all scored CVEs.
What is the CVSS score of CVE-2026-5430?
CVE-2026-5430 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-5430?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5430, 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.

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