{"cve":"CVE-2025-52477","nvd":{"published":"2025-06-26T17:15:30.897","modified":"2026-06-17T09:36:34.070","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6},"cwes":["CWE-918"],"references":["https://github.com/octo-sts/app/commit/0f177fde54f9318e33f0bba6abaea9463a7c3afd","https://github.com/octo-sts/app/commit/b3976e39bd8c8c217c0670747d34a4499043da92","https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq","https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq","https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:03:23.287444849+00:00"},"epss":{"cve":"CVE-2025-52477","score":0.00486,"percentile":0.41906,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-h3qp-hwvr-9xcq","url":"https://osv.dev/vulnerability/GHSA-h3qp-hwvr-9xcq","summary":"Octo STS Unauthenticated SSRF by abusing fields in OpenID Connect tokens","modified":"2026-09-10T03:50:25.281973166Z","packages":[{"ecosystem":"Go","name":"github.com/octo-sts/app","purl":"pkg:golang/github.com/octo-sts/app","ranges":["<0.5.3"],"fixed":["0.5.3"]}]},{"id":"GO-2025-3779","url":"https://osv.dev/vulnerability/GO-2025-3779","summary":"Octo STS Unauthenticated SSRF by abusing fields in OpenID Connect tokens in github.com/octo-sts/app","modified":"2026-02-04T02:43:28.915817Z","packages":[{"ecosystem":"Go","name":"github.com/octo-sts/app","purl":"pkg:golang/github.com/octo-sts/app","ranges":["<0.5.3"],"fixed":["0.5.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}