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4 vulnerabilities found for sigstore by sigstore
CVE-2026-31830 (GCVE-0-2026-31830)
Vulnerability from nvd – Published: 2026-03-10 21:46 – Updated: 2026-03-11 15:59
VLAI
Title
sigstore-ruby verifier returns success for DSSE bundles with mismatched in-toto subject digest
Summary
sigstore-ruby is a pure Ruby implementation of the sigstore verify command from the sigstore/cosign project. Prior to 0.2.3, Sigstore::Verifier#verify does not propagate the VerificationFailure returned by verify_in_toto when the artifact digest does not match the digest in the in-toto attestation subject. As a result, verification of DSSE bundles containing in-toto statements returns VerificationSuccess regardless of whether the artifact matches the attested subject. This vulnerability is fixed in 0.2.3.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-252 - Unchecked Return Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/sigstore/sigstore-ruby/securit… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sigstore | sigstore-ruby |
Affected:
< 0.2.3
|
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CVE-2026-24137 (GCVE-0-2026-24137)
Vulnerability from nvd – Published: 2026-01-23 00:04 – Updated: 2026-01-23 19:55
VLAI
Title
sigstore legacy TUF client allows for arbitrary file writes with target cache path traversal
Summary
sigstore framework is a common go library shared across sigstore services and clients. In versions 1.10.3 and below, the legacy TUF client (pkg/tuf/client.go) supports caching target files to disk. It constructs a filesystem path by joining a cache base directory with a target name sourced from signed target metadata; however, it does not validate that the resulting path stays within the cache base directory. A malicious TUF repository can trigger arbitrary file overwriting, limited to the permissions that the calling process has. Note that this should only affect clients that are directly using the TUF client in sigstore/sigstore or are using an older version of Cosign. Public Sigstore deployment users are unaffected, as TUF metadata is validated by a quorum of trusted collaborators. This issue has been fixed in version 1.10.4. As a workaround, users can disable disk caching for the legacy client by setting SIGSTORE_NO_CACHE=true in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/sigstore/sigstore/security/adv… | x_refsource_CONFIRM |
| https://github.com/sigstore/sigstore/commit/8ec41… | x_refsource_MISC |
| https://github.com/sigstore/sigstore/releases/tag… | x_refsource_MISC |
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CVE-2026-31830 (GCVE-0-2026-31830)
Vulnerability from cvelistv5 – Published: 2026-03-10 21:46 – Updated: 2026-03-11 15:59
VLAI
Title
sigstore-ruby verifier returns success for DSSE bundles with mismatched in-toto subject digest
Summary
sigstore-ruby is a pure Ruby implementation of the sigstore verify command from the sigstore/cosign project. Prior to 0.2.3, Sigstore::Verifier#verify does not propagate the VerificationFailure returned by verify_in_toto when the artifact digest does not match the digest in the in-toto attestation subject. As a result, verification of DSSE bundles containing in-toto statements returns VerificationSuccess regardless of whether the artifact matches the attested subject. This vulnerability is fixed in 0.2.3.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-252 - Unchecked Return Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/sigstore/sigstore-ruby/securit… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sigstore | sigstore-ruby |
Affected:
< 0.2.3
|
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CVE-2026-24137 (GCVE-0-2026-24137)
Vulnerability from cvelistv5 – Published: 2026-01-23 00:04 – Updated: 2026-01-23 19:55
VLAI
Title
sigstore legacy TUF client allows for arbitrary file writes with target cache path traversal
Summary
sigstore framework is a common go library shared across sigstore services and clients. In versions 1.10.3 and below, the legacy TUF client (pkg/tuf/client.go) supports caching target files to disk. It constructs a filesystem path by joining a cache base directory with a target name sourced from signed target metadata; however, it does not validate that the resulting path stays within the cache base directory. A malicious TUF repository can trigger arbitrary file overwriting, limited to the permissions that the calling process has. Note that this should only affect clients that are directly using the TUF client in sigstore/sigstore or are using an older version of Cosign. Public Sigstore deployment users are unaffected, as TUF metadata is validated by a quorum of trusted collaborators. This issue has been fixed in version 1.10.4. As a workaround, users can disable disk caching for the legacy client by setting SIGSTORE_NO_CACHE=true in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/sigstore/sigstore/security/adv… | x_refsource_CONFIRM |
| https://github.com/sigstore/sigstore/commit/8ec41… | x_refsource_MISC |
| https://github.com/sigstore/sigstore/releases/tag… | x_refsource_MISC |
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