Sigstore

29 CVEs across 13 Sigstore products. Browse Sigstore vulnerabilities, severities, and proof-of-concept exploits.

Sigstore products with known CVEs

ProductCVEs
Cosign9
Rekor5
Gitsign4
Sigstore-Js4
Fulcio3
Sigstore-Go3
Sigstore-Java3
Timestamp-Authority3
Sigstore2
Sigstore-Python2
Policy-Controller1
Policy Controller1
Sigstore-Ruby1
Sigstore CVEs — newest first
CVESeverityScorePublishedSummary
CVE-2026-48702High7.52026-08-13Rekor 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/alpin…
CVE-2026-49478High8.72026-08-13Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Versions through 1.8.5 improperly follow cross-h…
CVE-2026-48791Low2.02026-08-13sigstore-java is a sigstore java client for interacting with sigstore infrastructure. Version 2.0.0 erroneously removed verification of the integrated (Rekor e…
CVE-2026-54787Low3.12026-07-31sigstore-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 w…
CVE-2026-49834Medium5.92026-07-17sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.0, a verifier configured with WithTransparencyLog(N>1) or WithSignedCertificate…
CVE-2026-49835Medium5.92026-07-17Sigstore 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.UR…
CVE-2026-48816Medium6.52026-07-14sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.1.1, @sigstore/verify derives a transparency-log timestamp from tl…
CVE-2026-48815High7.52026-07-14sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 4.1.1, the documented certificateOIDs option in sigstore.verify() is…
CVE-2026-48758Medium5.42026-07-14sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js a…
CVE-2026-59891Critical9.62026-07-14sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.1, getRegistryCredentials() reads credentials from the Docker co…
CVE-2026-44310Medium5.42026-05-15Gitsign 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…
CVE-2026-44309Medium5.32026-05-15Gitsign 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-enc…
CVE-2026-39984Medium5.52026-04-15Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass vulnerability in the Verify…
CVE-2026-39395Medium4.32026-04-07Cosign 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 "V…
CVE-2026-31830High7.52026-03-10sigstore-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…
CVE-2026-24122Low3.72026-02-19Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires bef…
CVE-2026-24408Unrated2026-01-26sigstore-python is a Python tool for generating and verifying Sigstore signatures. Prior to version 4.2.0, the sigstore-python OAuth authentication flow is sus…
CVE-2026-24137Medium5.82026-01-23sigstore 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)…
CVE-2026-24117Medium5.32026-01-22Rekor 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…
CVE-2026-23831Medium5.32026-01-22Rekor is a software supply chain transparency log. In versions 1.4.3 and below, the entry implementation can panic on attacker-controlled input when canonicali…
CVE-2026-22772Medium5.82026-01-12Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.5, Fulcio's metaRegex() function us…
CVE-2026-22703Medium5.52026-01-10Cosign 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 veri…
CVE-2025-66564High7.52025-12-04Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call to string…
CVE-2025-66506High7.52025-12-04Fulcio 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.ex…
CVE-2024-556552024-12-10sigstore-python is a Python tool for generating and verifying Sigstore signatures. Versions of sigstore-python newer than 2.0.0 but prior to 3.6.0 perform insu…
CVE-2024-541402024-12-05sigstore-java is a sigstore java client for interacting with sigstore infrastructure. sigstore-java has insufficient verification for a situation where a bundl…
CVE-2024-53267Medium5.52024-11-26sigstore-java is a sigstore java client for interacting with sigstore infrastructure. sigstore-java has insufficient verification for a situation where a valid…
CVE-2024-517462024-11-05Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. gitsign may select the wrong Rekor entry to use during online…
CVE-2024-45395Low3.12024-09-04sigstore-go, a Go library for Sigstore signing and verification, is susceptible to a denial of service attack in versions prior to 0.6.1 when a verifier is pro…
CVE-2024-29903Medium4.22024-04-10Cosign provides code signing and transparency for containers and binaries. Prior to version 2.2.4, maliciously-crafted software artifacts can cause denial of s…
CVE-2024-29902Medium4.22024-04-10Cosign provides code signing and transparency for containers and binaries. Prior to version 2.2.4, a remote image with a malicious attachment can cause denial…
CVE-2023-47122Medium4.22023-11-10Gitsign is software for keyless Git signing using Sigstore. In versions of gitsign starting with 0.6.0 and prior to 0.8.0, Rekor public keys were fetched via t…
CVE-2023-46737Low3.12023-11-07Cosign is a sigstore signing tool for OCI containers. Cosign is susceptible to a denial of service by an attacker controlled registry. An attacker who controls…
CVE-2023-33199Medium5.32023-05-26Rekor's goals are to provide an immutable tamper resistant ledger of metadata generated within a software projects supply chain. A malformed proposed entry of…
CVE-2023-30551High7.52023-05-08Rekor is an open source software supply chain transparency log. Rekor prior to version 1.1.1 may crash due to out of memory (OOM) conditions caused by reading…
CVE-2022-36056Medium5.52022-09-14Cosign is a project under the sigstore organization which aims to make signatures invisible infrastructure. In versions prior to 1.12.0 a number of vulnerabili…
CVE-2022-35930High7.12022-08-04PolicyController is a utility used to enforce supply chain policy in Kubernetes clusters. In versions prior to 0.2.1 PolicyController will report a false posit…
CVE-2022-35929High7.12022-08-04cosign is a container signing and verification utility. In versions prior to 1.10.1 cosign can report a false positive if any attestation exists. `cosign verif…
CVE-2022-23649Low3.32022-02-18Cosign provides container signing, verification, and storage in an OCI registry for the sigstore project. Prior to version 1.5.2, Cosign can be manipulated to…