CVE-2026-39395

mediumPriorität · verfolgen · 21EPSS 0.003 · 21. PerzentilEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.29% (21st) EPSS

CVSS 5.3 · medium

Is it mine?

11 products

Prüfe deine Angriffsfläche

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · bewertet 2026-10-24

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.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

5.3

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · security-advisories@github.comAusnutzbarkeit 2.8 · Auswirkung 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · OSV

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Trackcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-754USCWE-754US

betroffene Produkte (11)

Betroffene Produkte und Versionsbereiche.

sigstore cosign≤ < 2.6.3enisa_euvdEU
sigstore cosign3.0.0, → 3.0.6enisa_euvdEU
sigstore cosign< 2.6.3nvdUScpe:2.3:a:sigstore:cosign:*:*:*:*:*:*:*:*
sigstore cosign3.0.0 → 3.0.6nvdUScpe:2.3:a:sigstore:cosign:*:*:*:*:*:*:*:*
Bitnami cosign< 2.6.3osvUSpkg:bitnami/cosign
Bitnami cosign3.0.0 → 3.0.6osvUSpkg:bitnami/cosign
Go github.com/sigstore/cosignalle VersionenosvUSpkg:golang/github.com/sigstore/cosign
Go github.com/sigstore/cosign< 2.6.3osvUSpkg:golang/github.com/sigstore/cosign
Go github.com/sigstore/cosign3.0.0 → 3.0.6osvUSpkg:golang/github.com/sigstore/cosign
Go github.com/sigstore/cosign/v2< 2.6.3osvUSpkg:golang/github.com/sigstore/cosign/v2
Go github.com/sigstore/cosign/v33.0.0 → 3.0.6osvUSpkg:golang/github.com/sigstore/cosign/v3

Advisories (3)

Hersteller- und Ökosystem-Meldungen dazu.

GHSA-w6c6-c85g-mmv6Cosign's verify-blob-attestation reports false positive when payload parsing fails2026-04-08ghsa · osvUS
## Description `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. ## Impact When `cosign verify-blob-attestation` is used without `--check-claims` set to `true`, an attestation that has a valid signature but a malformed or unparsable payload would be incorrectly validated. Additionally, systems relying on `--type <predicate type>` to reject attestations with mismatched types would be lead to trust the unexpected attestation type. ## Patches v3.0.6, v2.6.3 ## Workarounds Always set `--check-claims=true` for attestation verification.
BIT-cosign-2026-39395Cosign's verify-blob-attestation reports false positive when payload parsing fails2026-04-09vendor · osvUS
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.
GO-2026-5694Cosign's verify-blob-attestation reports false positive when payload parsing fails in github.com/sigstore/cosign2026-06-25vendor · osvUS
Cosign's verify-blob-attestation reports false positive when payload parsing fails in github.com/sigstore/cosign

auch bekannt als (6)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

veröffentlicht 2026-04-07geändert 2026-07-24

Referenzen (4)

Externe Belege — Patches, Meldungen, Analysen.

scry

Angreifer nutzen Schwachstellen wie diese gegen im Internet exponierte Dienste aus. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.

Kostenloser Scan