Vendor
Sigstore vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 13 vulnerabilities in Sigstore: 0 in the last 7 days and 9 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-54787, was published on 31 July 2026. 1 technology has a page of its own.
- Last 7 days
- 0
- Last 90 days
- 9
- Critical, all time
- 1
- Exploited in the wild
- 0
About Sigstore
An open-source project providing tools and services for secure software signing and verification.
Sigstore technologies
Latest Sigstore vulnerabilities
- CVE-2026-54787: sigstore-go expired key usage in self-managed signing workflowlowCVSS 3.1EPSS 0.1%
- CVE-2026-49834: Sigstore sigstore-go multi-log threshold bypassmediumCVSS 5.9EPSS 0.2%
- CVE-2026-49835: Sigstore Timestamp Authority memory exhaustion in wrapMetrics middlewaremediumCVSS 5.9EPSS 0.7%
- CVE-2026-48816: sigstore-js insufficient verification of data authenticity in @sigstore/verifymediumCVSS 6.5EPSS 0.2%
- CVE-2026-48815: sigstore-js improper verification of certificate OIDshighCVSS 7.5EPSS 0.2%
- CVE-2026-48758: sigstore-js signature type-binding failure in @sigstore/coremediumCVSS 5.4EPSS 0.3%
- CVE-2026-59891: Sigstore sigstore-js credential leakage via registry substring matchcriticalCVSS 9.6EPSS 0.5%
- CVE-2026-49478: Sigstore Fulcio SSRF and Token Leakage in OIDC DiscoveryhighCVSS 8.7EPSS 0.3%
- CVE-2026-48791: Sigstore Java improper signature verification in KeylessVerifierlowCVSS 3.1EPSS 0.1%
- CVE-2026-48702: Sigstore Rekor OOM via unbounded decompression in Alpine APK parsinghighCVSS 7.5EPSS 0.5%
- CVE-2026-44310: Sigstore Gitsign signature verification bypass via empty certificate setmediumCVSS 5.4EPSS 0.2%
- CVE-2026-44309: Sigstore Gitsign improper signature verification via go-git re-encodingmediumCVSS 5.3EPSS 0.2%
- CVE-2026-39395: Sigstore Cosign validation bypass in verify-blob-attestationmediumCVSS 4.3EPSS 0.3%
Most severe Sigstore vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-59891: Sigstore sigstore-js credential leakage via registry substring matchcriticalCVSS 9.6EPSS 0.5%
- CVE-2026-49478: Sigstore Fulcio SSRF and Token Leakage in OIDC DiscoveryhighCVSS 8.7EPSS 0.3%
- CVE-2026-48702: Sigstore Rekor OOM via unbounded decompression in Alpine APK parsinghighCVSS 7.5EPSS 0.5%
- CVE-2026-48815: sigstore-js improper verification of certificate OIDshighCVSS 7.5EPSS 0.2%
- CVE-2026-48816: sigstore-js insufficient verification of data authenticity in @sigstore/verifymediumCVSS 6.5EPSS 0.2%
- CVE-2026-49835: Sigstore Timestamp Authority memory exhaustion in wrapMetrics middlewaremediumCVSS 5.9EPSS 0.7%
- CVE-2026-49834: Sigstore sigstore-go multi-log threshold bypassmediumCVSS 5.9EPSS 0.2%
- CVE-2026-48758: sigstore-js signature type-binding failure in @sigstore/coremediumCVSS 5.4EPSS 0.3%
- CVE-2026-44310: Sigstore Gitsign signature verification bypass via empty certificate setmediumCVSS 5.4EPSS 0.2%
- CVE-2026-44309: Sigstore Gitsign improper signature verification via go-git re-encodingmediumCVSS 5.3EPSS 0.2%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 2 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 6 | 1 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 1 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/sigstore.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Sigstore vulnerabilities", https://junglewise.ai/threats/vendors/sigstore, 26 September 2026.