SUSE SLED15 / SLES15 Security Update : cosign (SUSE-SU-2026:2365-1)

medium Nessus Plugin ID 321040

Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:2365-1 advisory.

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)
* disallow key and cert identity being used together during verification (#4636)
* support key creation in GitLab group (#4704)
- Set CGO_ENABLED=1 for fixing s390x failed build
- build against a maintained golang version (upstream uses go1.20)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected cosign, cosign-bash-completion and / or cosign-zsh-completion packages.

Plugin Details

Severity: Medium

ID: 321040

File Name: suse_SU-2026-2365-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 6/14/2026

Updated: 6/14/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2026-39395

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:cosign-zsh-completion, p-cpe:/a:novell:suse_linux:cosign-bash-completion, p-cpe:/a:novell:suse_linux:cosign, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/11/2026

Vulnerability Publication Date: 4/7/2026

Reference Information

CVE: CVE-2026-39395

SuSE: SUSE-SU-2026:2365-1

Detections

Analytics