What is CVE-2026-55221?

CVE-2026-55221 is a medium-severity vulnerability, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.5/10. Published 2026-09-02.

How severe is CVE-2026-55221?

Medium severity. CVSS v3 base score is 6.5 out of 10.

CVE-2026-55221

CVE-2026-55221

Boruta is a standalone authorization server that aims to implement OAuth 2.0 and Openid Connect up to decentralized identity specifications. Prior to version 0.10.0, Boruta logged sensitive OAuth and OpenID Connect values in business event logs. Logged values could include access tokens, refresh tokens, authorization codes, agent tokens, direct-post codes, ID tokens, VP tokens, and tokens submitted to introspection or revocation endpoints. An attacker with access to Boruta logs, log aggregation systems, or the administration log viewer could recover these credentials and use them until expiration or revocation. This issue has been patched in version 0.10.0.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

Frequently asked questions

What is CVE-2026-55221?: CVE-2026-55221 is a medium-severity vulnerability, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.5/10. Published 2026-09-02.
How severe is CVE-2026-55221?: Medium severity. CVSS v3 base score is 6.5 out of 10.