CVE-2025-52477
High
Description
Octo-STS is a GitHub App that acts like a Security Token Service (STS) for the GitHub API. 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. Upgrade to v0.5.3 to resolve this issue. This version includes patch sets to sanitize input and redact logging.
SeverityHigh
CVSS8.6
Exploit probability—
ProductGithub.com/octo-sts/app
PublishedJun 26, 2025
First seenJun 26, 2025
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- github.com/octo-sts/app0.5.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/octo-sts/appGo | v < 0.5.3 | 0.5.3 |
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