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CVE-2025-52477 — Vulnerability in github.com/octo-sts/app — CVE...

HIGH

Octo STS Unauthenticated SSRF by abusing fields in OpenID Connect tokens

Published June 26, 2025Updated September 10, 2026Source: osv

Summary

## 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](https://github.com/octo-sts/app/commit/b3976e39bd8c8c217c0670747d34a4499043da92) and [redact logging](https://github.com/octo-sts/app/commit/0f177fde54f9318e33f0bba6abaea9463a7c3afd). 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

Advisory Timeline

  • First published June 26, 2025 (473 days ago).
  • Last revised September 10, 2026 — 440 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Go
Update github.com/octo-sts/app to 0.5.3 or later
go get github.com/octo-sts/app@v0.5.3

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: go (1).

PackageEcosystemAffectedFixed In
github.com/octo-sts/app
go
All versions0.5.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-918
    Server-Side Request Forgery (SSRF)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.6 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2025-52477?
Octo STS Unauthenticated SSRF by abusing fields in OpenID Connect tokens This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.6/10).
How do I check if my project is affected by CVE-2025-52477?
CVE-2025-52477 affects github.com/octo-sts/app. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-52477 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.6

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-h3qp-hwvr-9xcq
GO-2025-3779

Related CVEs

  • CVE-2026-107809
    HIGH

    Nginx-UI AuthRequired token cookie fallback enables CSRF against management APIs

  • CVE-2026-107813
    HIGH

    Nginx UI: Incomplete fix of CVE-2026-84315 - the api/cluster router was not - wrapped in RequireSecureSession, so those sensitive mutations run without OTP step-up

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