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6 vulnerabilities by octo-sts
CVE-2026-105770 (GCVE-0-2026-105770)
Vulnerability from nvd – Published: 2026-11-03 00:41 – Updated: 2026-11-06 17:51
VLAI
EPSS
VEX
Title
Octo STS discloses trust policy contents to unauthorized callers via Exchange error messages
Summary
Octo STS (github.com/octo-sts/app) before 0.11.2 returns trust policy configuration to callers whose OIDC token does not satisfy that policy. TrustPolicy.CheckToken included the policy's issuer, subject and audience values or patterns and claim_pattern names and regular expressions in its PermissionDenied errors, which Exchange returned verbatim. Exchange also selected the GitHub App installation before checking the token, so errors from resolving the policy's app or app_pattern pin were returned to callers the policy does not trust. An attacker who holds any validly signed OIDC token, such as a GitHub Actions token from a repository they own, and who knows or guesses a target owner/repo and identity name can read that policy's matching rules, even when the policy is stored in a private repository. These rules often name internal repositories, branches, environments or cloud account identifiers. The issue does not allow minting tokens or bypassing a trust policy. This issue is fixed in 0.11.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:51 UTC
CWE
- CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/octo-sts/app/security/advisori… | vendor-advisory |
| https://github.com/octo-sts/app/commit/88c6432adc… | patch |
| https://github.com/octo-sts/app/releases/tag/v0.11.2 | release-notes |
Date Public
2026-10-06 19:34
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CVE-2025-52477 (GCVE-0-2025-52477)
Vulnerability from nvd – Published: 2025-06-26 16:46 – Updated: 2025-06-27 13:16
VLAI
EPSS
VEX
Title
Octo-STS Vulnerable to Unauthenticated SSRF with HTTP Response Reflection in OIDC Flow
Summary
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.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-27 13:16 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/octo-sts/app/security/advisori… | x_refsource_CONFIRM |
| https://github.com/octo-sts/app/commit/0f177fde54… | x_refsource_MISC |
| https://github.com/octo-sts/app/commit/b3976e39bd… | x_refsource_MISC |
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CVE-2024-34079 (GCVE-0-2024-34079)
Vulnerability from nvd – Published: 2024-05-10 19:05 – Updated: 2024-08-02 02:42
VLAI
EPSS
VEX
Title
octo-sts allows unauthenticated attackers to cause unbounded CPU and memory usage
Summary
octo-sts is a GitHub App that acts like a Security Token Service (STS) for the Github API. This vulnerability can spike the resource utilization of the STS service, and combined with a significant traffic volume could potentially lead to a denial of service. This vulnerability is fixed in 0.1.0
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-28 20:16 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/octo-sts/app/security/advisori… | x_refsource_CONFIRM |
| https://github.com/octo-sts/app/commit/74ba874c01… | x_refsource_MISC |
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CVE-2026-105770 (GCVE-0-2026-105770)
Vulnerability from cvelistv5 – Published: 2026-11-03 00:41 – Updated: 2026-11-06 17:51
VLAI
EPSS
VEX
Title
Octo STS discloses trust policy contents to unauthorized callers via Exchange error messages
Summary
Octo STS (github.com/octo-sts/app) before 0.11.2 returns trust policy configuration to callers whose OIDC token does not satisfy that policy. TrustPolicy.CheckToken included the policy's issuer, subject and audience values or patterns and claim_pattern names and regular expressions in its PermissionDenied errors, which Exchange returned verbatim. Exchange also selected the GitHub App installation before checking the token, so errors from resolving the policy's app or app_pattern pin were returned to callers the policy does not trust. An attacker who holds any validly signed OIDC token, such as a GitHub Actions token from a repository they own, and who knows or guesses a target owner/repo and identity name can read that policy's matching rules, even when the policy is stored in a private repository. These rules often name internal repositories, branches, environments or cloud account identifiers. The issue does not allow minting tokens or bypassing a trust policy. This issue is fixed in 0.11.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:51 UTC
CWE
- CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/octo-sts/app/security/advisori… | vendor-advisory |
| https://github.com/octo-sts/app/commit/88c6432adc… | patch |
| https://github.com/octo-sts/app/releases/tag/v0.11.2 | release-notes |
Date Public
2026-10-06 19:34
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CVE-2025-52477 (GCVE-0-2025-52477)
Vulnerability from cvelistv5 – Published: 2025-06-26 16:46 – Updated: 2025-06-27 13:16
VLAI
EPSS
VEX
Title
Octo-STS Vulnerable to Unauthenticated SSRF with HTTP Response Reflection in OIDC Flow
Summary
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.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-27 13:16 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/octo-sts/app/security/advisori… | x_refsource_CONFIRM |
| https://github.com/octo-sts/app/commit/0f177fde54… | x_refsource_MISC |
| https://github.com/octo-sts/app/commit/b3976e39bd… | x_refsource_MISC |
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CVE-2024-34079 (GCVE-0-2024-34079)
Vulnerability from cvelistv5 – Published: 2024-05-10 19:05 – Updated: 2024-08-02 02:42
VLAI
EPSS
VEX
Title
octo-sts allows unauthenticated attackers to cause unbounded CPU and memory usage
Summary
octo-sts is a GitHub App that acts like a Security Token Service (STS) for the Github API. This vulnerability can spike the resource utilization of the STS service, and combined with a significant traffic volume could potentially lead to a denial of service. This vulnerability is fixed in 0.1.0
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-28 20:16 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/octo-sts/app/security/advisori… | x_refsource_CONFIRM |
| https://github.com/octo-sts/app/commit/74ba874c01… | x_refsource_MISC |
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