CVE-2026-39395
Cosign's verify-blob-attestation reports false positive when payload parsing fails
4.3
MEDIUM
CVSS 3.1
EPSS 0.24%
描述
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 detached signatures, this was due to a logic flaw in the error handling of the predicate type validation. For new-format bundles, the predicate type validation was bypassed completely. This vulnerability is fixed in 3.0.6 and 2.6.3.
如何修補 CVE-2026-39395
要修補 CVE-2026-39395,請將受影響套件升級到下列已修補版本。
- —升級至 2.6.3 或更新版本
- —未列出修補版本
- —升級至 3.0.6 或更新版本
- —未列出修補版本
- —升級至 2.6.3 或更新版本
- —升級至 3.0.6 或更新版本
CVE-2026-39395 正在被利用嗎?
低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。
受影響套件(6)
- from 0, < 2.6.3, >= 3.0.0, < 3.0.6
- from 0
- >= 3.0.0, < 3.0.6
- from 0
- from 0, < 2.6.3
- >= 3.0.0, < 3.0.6
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |