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openSUSE 16.0 Cosign Moderate Attestation Verification Issue 2026-21036-1

opensuse
Calendar Grey June 30, 2026
Dist Opensuse Esm H88
This security update addresses a moderate vulnerability in cosign that could affect attestation verification and includes a bug fix.
An update that solves one vulnerability and has one bug fix can now be installed.

Description

This update for cosign fixes the following issues

Security issue:

- CVE-2026-39395: Incorrect attestation verification due to malformed payloads or mismatched predicate types

(bsc#1261859).

Non security issue:

- Update to version 3.0.5 (jsc#SLE-23879).

Patch instructions:

To install this openSUSE security update use the suse recommended installation methods

like YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

zypper in -t patch openSUSE-Leap-16.0-1049=1

Topics%20covered

Topics Covered

security advisory moderate bug fix OpenSUSE attestation cosign

Patch

Package List

- openSUSE Leap 16.0:

cosign-3.0.6-160000.1.1

cosign-bash-completion-3.0.6-160000.1.1

cosign-fish-completion-3.0.6-160000.1.1

cosign-zsh-completion-3.0.6-160000.1.1

References

* bsc#1261859

References:

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

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:21036-1
Rating: moderate
Affected Products: openSUSE Leap 16.0 -------------------------------------------------------------

Topics%20covered

Topics Covered

security advisory moderate bug fix OpenSUSE attestation cosign

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