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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…

Critical CVSS 10.0
CVECVE-2026-5430
First seen2026-08-06 08:30 UTC
Disclosed2026-08-06 08:16 UTC
Last updated2026-08-06 08:30 UTC
Channel statusauto

Summary

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…

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Lint boundary warnings (1)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD