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openSUSE Cosign Moderate Attestation Verification Issue SUSE-2026-2365-1

suse
Calendar Grey June 11, 2026
Dist Suse Esm H88
A security update for cosign addresses a moderate-level issue in openSUSE with incorrect attestation verification.
An update that solves one vulnerability can now be installed.

Summary

## This update for cosign fixes the following issue * CVE-2026-39395: Incorrect attestation verification due to malformed payloads or mismatched predicate types (bsc#1261859). Changes for cosign: * update to 3.0.6: * Fix DSSE predicate check (GHSA-w6c6-c85g-mmv6) (#4801) * Handle whitespace-only certificate annotation (#4760) * fix(sign): closing SignerVerifier too early when signing with a security key (#4761) * Disallow --new-bundle-format and --rfc3161-timestamp (#4762) * support managed keys in conformance testing (#4728) * Add support for GCE metadata server env var (#4732) * fix: preserve per-layer annotations in WriteAttestationsReferrer (#4709) * Fix parsing of in-toto for string predicates * Mark batch of flags for deprecation (#4698)

Topics%20covered

Topics Covered

security advisory moderate update OpenSUSE attestation cosign

References

* bsc#1261859

Cross-

* CVE-2026-39395

CVSS scores:

* CVE-2026-39395 ( SUSE ): 6.9

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

* CVE-2026-39395 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

* CVE-2026-39395 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

* CVE-2026-39395 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Products:

* Basesystem Module 15-SP7

* openSUSE Leap 15.4

* SUSE Linux Enterprise Desktop 15 SP7

* SUSE Linux Enterprise Real Time 15 SP7

* SUSE Linux Enterprise Server 15 SP7

* SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves one vulnerability can now be installed.

##

* https://www.suse.com/security/cve/CVE-2026-39395.html

* https://bugzilla.suse.com/show_bug.cgi?id=1261859

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2365-1
Release Date: 2026-06-11T07:58:20Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate update OpenSUSE attestation cosign

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