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openSUSE 15.4 Cosign Moderate Attestation Verification Issue 2026-2365-1

opensuse
Calendar Grey June 11, 2026
Dist Opensuse Esm H88
Update for cosign addresses a moderate risk vulnerability related to malformed payloads and verification issues.
An update that solves one vulnerability can now be installed.

Description

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...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate OpenSUSE threat correction attestation cosign update

Patch

## Patch Instructions:

To install this SUSE 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 15.4

zypper in -t patch SUSE-2026-2365=1

* Basesystem Module 15-SP7

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-2365=1

Package List

* openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64 i586)

* cosign-3.0.6-150400.3.42.1

* cosign-debuginfo-3.0.6-150400.3.42.1

* openSUSE Leap 15.4 (noarch)

* cosign-bash-completion-3.0.6-150400.3.42.1

* cosign-zsh-completion-3.0.6-150400.3.42.1

* cosign-fish-completion-3.0.6-150400.3.42.1

* Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)

* cosign-3.0.6-150400.3.42.1

* cosign-debuginfo-3.0.6-150400.3.42.1

* Basesystem Module 15-SP7 (noarch)

* cosign-bash-completion-3.0.6-150400.3.42.1

* cosign-zsh-completion-3.0.6-150400.3.42.1

References

* bsc#1261859

## References:

* 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
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

Topics%20covered

Topics Covered

security advisory moderate OpenSUSE threat correction attestation cosign update

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