Description
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 holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| sigstore | sigstore-go | < 1.2.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | sigstore-go | 1.2.1-1 | — |
| Debian 13 | sigstore-go | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | sigstore-go | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | sigstore-go | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | cosign | 3.1.2-0.2.hum1 | RHSA-2026:44451 |
| Red Hat Hardened Images 1 | spire1.14 +3 | 1.14.7-0.3.hum1 | RHSA-2026:47889 |
| Red Hat Hardened Images 1 | spire1.15 +3 | 1.15.2-0.3.hum1 | RHSA-2026:44162 |
| Red Hat Hardened Images 1 | trivy | 0.72.0-0.1.3.hum1 | RHSA-2026:47891 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | govulncheck-vulndb | 0.0.20260827T195228-160000.1.1 | SUSE-SU-2026:23625-1 |
| SLES 16.0 | govulncheck-vulndb | 0.0.20260827T195228-160000.1.1 | SUSE-SU-2026:23625-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260827T195228-160000.1.1 | openSUSE-SU-2026:21761-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | gh | 2.97.0-1 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | aactl | 0.4.12-r67 | — |
| Wolfi rolling | crossplane-2.2 +1 | 2.2.4-r2 | — |
| Wolfi rolling | falcoctl | 0.13.0-r17 | — |
| Wolfi rolling | flux-source-controller | 1.9.3-r3 | — |
| Wolfi rolling | goreleaser | 2.17.1-r1 | — |
| Wolfi rolling | ko | 0.19.1-r2 | — |
| Wolfi rolling | kubescape | 4.0.11-r4 | — |
| Wolfi rolling | kyverno-1.17 | 1.17.2-r35 | — |
| Wolfi rolling | kyverno-1.18 +5 | 1.18.2-r5 | — |
| Wolfi rolling | kyverno-cli-1.17 +4 | 1.17.2-r26 | — |
| Wolfi rolling | kyverno-notation-aws | 1.1-r72 | — |
| Wolfi rolling | neuvector-sigstore-interface | 0_git20260617-r8 | — |
| Wolfi rolling | policy-controller +1 | 0.15.1-r21 | — |
| Wolfi rolling | skaffold | 2.24.0-r1 | — |
| Wolfi rolling | slsa-verifier +3 | No fix yet | — |
| Wolfi rolling | spire-agent | 1.15.2-r4 | — |
| Wolfi rolling | tekton-chains | 0.28.1-r4 | — |
| Wolfi rolling | tkn | 0.45.1-r1 | — |
| Wolfi rolling | trivy | 0.72.0-r7 | — |
| Wolfi rolling | trivy-operator | 0.32.0-r1 | — |
| Wolfi rolling | zarf | 0.82.0-r2 | — |
| Wolfi rolling | zot | 2.1.18-r7 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/sigstore/sigstore-go | < 1.2.1 | 1.2.1 | GHSA-wqqc-jjcq-vfxm |
Advisories 6
- RHSA-2026:44451 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:44162 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:47889 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- SUSE-SU-2026:23625-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 29, 2026
- RHSA-2026:47891 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- openSUSE-SU-2026:21761-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 9, 2026