CVE-2026-49834
- Source
- https://cve.org/CVERecord?id=CVE-2026-49834
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-49834.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-49834
- Aliases
- Downstream
- Published
- 2026-07-17T19:20:06.140Z
- Modified
- 2026-08-01T03:47:00.926750537Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- sigstore-go: Multi-log threshold bypass via single compromised log
- Details
-
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 single compromised transparency log or CT log to satisfy multi-log threshold requirements and defeat the multi-log policy. This issue is fixed in version 1.2.0.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49834.json", "cwe_ids": [ "CWE-347" ], "cna_assigner": "GitHub_M" }- References
-
- https://github.com/sigstore/sigstore-go/releases/tag/v1.2.0
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49834.json
- https://github.com/sigstore/sigstore-go/security/advisories/GHSA-9vcr-p3rj-q5q6
- https://nvd.nist.gov/vuln/detail/CVE-2026-49834
- https://github.com/sigstore/sigstore-go/commit/dbb07e62623edd5b175fb9dd5a41dcb85a159207
- https://github.com/sigstore/sigstore-go/pull/633
Affected packages
Git / github.com/sigstore/sigstore-go
Affected ranges
- Type
- GIT
- Repo
- https://github.com/sigstore/sigstore-go
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
{ "source": [ "CPE_RANGE", "REFERENCES" ], "cpe": "cpe:2.3:a:sigstore:sigstore-go:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "1.2.0" } ] }