GitHub Advisoryadvisory · Go
GHSA-h3qp-hwvr-9xcq Octo STS Unauthenticated SSRF by abusing fields in OpenID Connect tokens
HIGH
Official page ↗
- Aliases
- CVE-2025-52477
- Ecosystem
- Go
- Packages
- github.com/octo-sts/app
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Weaknesses
- CWE-918
- Reviewed
- 2025-06-26
Affected packages
• Go github.com/octo-sts/app: < 0.5.3 → fixed in 0.5.3
Description
Summary
Octo-STS versions before v0.5.3 are vulnerable to unauthenticated SSRF by abusing fields in OpenID Connect tokens. Malicious tokens were shown to trigger internal network requests which could reflect error logs with sensitive information.
Please upgrade to v0.5.3 to resolve this issue. This version includes patch sets to sanitize input and redact logging.
Many thanks to @vicevirus for reporting this issue and for assisting with remediation review.
References
• https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq
• https://github.com/octo-sts/app/commit/b3976e39bd8c8c217c0670747d34a4499043da92
• https://github.com/octo-sts/app/commit/0f177fde54f9318e33f0bba6abaea9463a7c3afd
Related
Alias · CVE (1)
- CVE-2025-52477 Octo-STS is a GitHub App that acts like a Security Token Service (STS) for the GitHub API. vulnerability
Weakness · CWE (1)
- CWE-918 Server-Side Request Forgery weakness
References
- https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq web
- https://nvd.nist.gov/vuln/detail/CVE-2025-52477 advisory
- https://github.com/octo-sts/app/commit/0f177fde54f9318e33f0bba6abaea9463a7c3afd web
- https://github.com/octo-sts/app/commit/b3976e39bd8c8c217c0670747d34a4499043da92 web
- https://github.com/octo-sts/app package