sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.2, packages/oci/src/registry.ts contains a RegistryClient.signIn() method that stores registry Authorization and Docker configuration headers as defaults on a shared HTTP client, while...
Vendor
sigstore vulnerabilities
40 published CVES affecting sigstore, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).
- Total
- 40
- Critical
- 2
- High
- 13
- Medium
- 18
- Low
- 7
- Unscored
- 0
- CISA KEV
- 0
Products
- github.com/sigstore/cosign 9
- rekor 5
- sigstore-js 5
- github.com/sigstore/gitsign 4
- github.com/sigstore/fulcio 3
- github.com/sigstore/timestamp-authority 3
- sigstore-go 3
- sigstore-java 3
- @sigstore/oci 2
- sigstore 2
- sigstore-python 2
- @sigstore/core 1
- @sigstore/verify 1
- github.com/sigstore/policy-controller 1
- policy controller 1
- sigstore-ruby 1
Latest sigstore CVEs
Newest publication first · page 1 of 2
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HighCVSS 7.4 EPSS 0.30%
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HighCVSS 7.5 EPSS 0.46%
Rekor is a software supply chain transparency log. Starting in version 0.3.0 and prior to version 1.5.2, the Package.Unmarshal() function in pkg/types/alpine/apk.go decompresses the signature and control gzip members of an APK file into in-memory buffers without bounding the tota...
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HighCVSS 8.7 EPSS 0.28%
Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Versions through 1.8.5 improperly follow cross-host redirects and attach Kubernetes ServiceAccount tokens during OIDC discovery, allowing a malicious or compromised issu...
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CVE-2026-48791 Sigstore Java has a vulnerability with bundle verification of integratedTime
PublishedLowCVSS 2.0 EPSS 0.07%sigstore-java is a sigstore java client for interacting with sigstore infrastructure. Version 2.0.0 erroneously removed verification of the integrated (Rekor entry) time) against the Fulcio certificate. Version 2.1.0 re-added this verification with enhancements that adhere to the...
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LowCVSS 3.1 EPSS 0.13%
sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker...
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HighCVSS 7.5 EPSS 0.18%
sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.0, a verifier configured with WithTransparencyLog(N>1) or WithSignedCertificateTimestamps(N>1) counts verified witnesses per entry or per validation path rather than per log authority, allowing a sing...
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CVE-2026-49835 Sigstore Timestamp Authority: OOM due to unbounded metric label cardinality
PublishedHighCVSS 7.5 EPSS 0.74%Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.1.0, the global wrapMetrics middleware records raw HTTP request path r.URL.Path and raw HTTP request method r.Method as Prometheus labels for latency and request count metric vectors before rout...
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MediumCVSS 6.5 EPSS 0.14%
sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.1.1, @sigstore/verify derives a transparency-log timestamp from tlogEntries[].integratedTime for bundle v0.2 inclusionProof-only entries even though the inclusion proof path does not cryp...
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MediumCVSS 5.4 EPSS 0.24%
sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidat...
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HighCVSS 7.5 EPSS 0.17%
sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 4.1.1, the documented certificateOIDs option in sigstore.verify() is accepted by the public API but discarded before verification, so required certificate extension OIDs are never checked a...
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CriticalCVSS 9.6 EPSS 0.47%
sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.1, getRegistryCredentials() reads credentials from the Docker config file and selects an entry by checking whether any configured auth key contains the target registry string. Because t...
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MediumCVSS 5.3 EPSS 0.14%
Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. Prior to 0.16.0, gitsign verify and gitsign verify-tag re-encode commit/tag objects through go-git's EncodeWithoutSignature before checking the signature, instead of verifying agains...
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MediumCVSS 5.4 EPSS 0.13%
Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. From 0.4.0 to before 0.15.0, CertVerifier.Verify() in pkg/git/verifier.go unconditionally dereferences certs[0] after sd.GetCertificates() without checking the slice length. A CMS/PK...
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CVE-2026-39984 Sigstore Timestamp Authority has Improper Certificate Validation in verifier
PublishedMediumCVSS 5.5 EPSS 0.10%Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass vulnerability in the VerifyTimestampResponse function. VerifyTimestampResponse correctly verifies the certificate chain signature, but the TSA-speci...
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CVE-2026-39395 Cosign's verify-blob-attestation reports false positive when payload parsing fails
PublishedMediumCVSS 5.3 EPSS 0.25%Cosign provides code signing and transparency for containers and binaries. Prior to 3.0.6 and 2.6.3, cosign verify-blob-attestation may erroneously report a "Verified OK" result for attestations with malformed payloads or mismatched predicate types. For old-format bundles and det...
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HighCVSS 7.5 EPSS 0.28% PoC
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 i...
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LowCVSS 3.7 EPSS 0.22%
Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issui...
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MediumCVSS 5.0 EPSS 0.18%
sigstore-python is a Python tool for generating and verifying Sigstore signatures. Prior to version 4.2.0, the sigstore-python OAuth authentication flow is susceptible to Cross-Site Request Forgery. _OAuthSession creates a unique "state" and sends it as a parameter in the authent...
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MediumCVSS 5.8 EPSS 0.39%
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 na...
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CVE-2026-24117 Rekor affected by Server-Side Request Forgery (SSRF) via provided public key URL
PublishedMediumCVSS 5.3 EPSS 0.36%Rekor is a software supply chain transparency log. In versions 1.4.3 and below, attackers can trigger SSRF to arbitrary internal services because /api/v1/index/retrieve supports retrieving a public key via user-provided URL. Since the SSRF only can trigger GET requests, the reque...
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MediumCVSS 5.3 EPSS 0.43%
Rekor is a software supply chain transparency log. In versions 1.4.3 and below, the entry implementation can panic on attacker-controlled input when canonicalizing a proposed entry with an empty spec.message, causing nil Pointer Dereference. Function validate() returns nil (succe...
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CVE-2026-22772 Fulcio vulnerable to Server-Side Request Forgery (SSRF) via MetaIssuer Regex Bypass
PublishedMediumCVSS 5.3 EPSS 0.23%Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.5, Fulcio's metaRegex() function uses unanchored regex, allowing attackers to bypass MetaIssuer URL validation and trigger SSRF to arbitrary internal servic...
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MediumCVSS 5.5 EPSS 0.11%
Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When v...
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CVE-2025-66564 Sigstore Timestamp Authority allocates excessive memory during request parsing
PublishedHighCVSS 7.5 EPSS 0.48%Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call to strings.Split) an optionally-provided OID (which is untrusted data) on periods. Similarly, function api.getContentType splits t...
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HighCVSS 7.5 EPSS 0.23%
Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.3, function identity.extractIssuerURL splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in th...
Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.