DEBIAN-CVE-2026-39395

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Source

https://security-tracker.debian.org/tracker/CVE-2026-39395

Import Source

https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39395.json

JSON Data

https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-39395

Upstream

CVE-2026-39395

Published

2026-04-07T20:16:33Z

Modified

2026-08-27T23:05:59Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator

Summary

[none]

Details

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.

References

https://security-tracker.debian.org/tracker/CVE-2026-39395

Affected packages

Debian:13 / cosign

Package

Name: cosign
Purl: pkg:deb/debian/cosign?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.5.0-2

2.6.2-1~exp0

2.6.2-1

2.6.3-1

3.*

3.0.5-1~exp0

3.0.6-1~exp0

3.0.6-1

3.1.0-1~exp0

3.1.1-1~exp0

3.1.1-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39395.json"

Debian:14 / cosign