Red Hat Security Advisory: buildah security update
The buildah package provides a tool for facilitating building OCI container images. Among other things, buildah enables you to: Create a working container, either from scratch or using an image as a starting point; Create an image, either from a working container or using the instructions in a Dockerfile; Build both Docker and OCI images. Security Fix(es): * github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object (CVE-2026-34986) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The buildah package in Red Hat Enterprise Linux 9 contains a vulnerability identified as CVE-2026-34986, which involves a denial of service (DoS) condition triggered by a crafted JSON Web Encryption (JWE) object. This vulnerability arises from the Go JOSE library (github.com/go-jose/go-jose/v3 upgraded to v4). Buildah facilitates building OCI and Docker container images and uses this library for cryptographic operations. The issue is fixed in buildah version 1.41.8-3.el9_7, which has been released by Red Hat as part of an important security advisory (RHSA-2026:10135). The advisory covers multiple architectures including x86_64, s390x, ppc64le, and aarch64. The update mitigates the denial of service vulnerability by upgrading the affected Go JOSE library. No CVSS score is provided, but the vendor rates the impact as important.
Potential Impact
The vulnerability allows an attacker to cause a denial of service in the buildah tool by supplying a crafted JSON Web Encryption object. This could disrupt container image building processes that rely on buildah. There are no reports of active exploitation in the wild. The impact is limited to denial of service and does not indicate code execution or data disclosure.
Mitigation Recommendations
Red Hat has released an updated buildah package version 1.41.8-3.el9_7 that addresses this vulnerability. Users of Red Hat Enterprise Linux 9 should apply this update promptly following Red Hat's published guidance at https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official patch.
Red Hat Security Advisory: buildah security update
Description
The buildah package provides a tool for facilitating building OCI container images. Among other things, buildah enables you to: Create a working container, either from scratch or using an image as a starting point; Create an image, either from a working container or using the instructions in a Dockerfile; Build both Docker and OCI images. Security Fix(es): * github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object (CVE-2026-34986) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The buildah package in Red Hat Enterprise Linux 9 contains a vulnerability identified as CVE-2026-34986, which involves a denial of service (DoS) condition triggered by a crafted JSON Web Encryption (JWE) object. This vulnerability arises from the Go JOSE library (github.com/go-jose/go-jose/v3 upgraded to v4). Buildah facilitates building OCI and Docker container images and uses this library for cryptographic operations. The issue is fixed in buildah version 1.41.8-3.el9_7, which has been released by Red Hat as part of an important security advisory (RHSA-2026:10135). The advisory covers multiple architectures including x86_64, s390x, ppc64le, and aarch64. The update mitigates the denial of service vulnerability by upgrading the affected Go JOSE library. No CVSS score is provided, but the vendor rates the impact as important.
Potential Impact
The vulnerability allows an attacker to cause a denial of service in the buildah tool by supplying a crafted JSON Web Encryption object. This could disrupt container image building processes that rely on buildah. There are no reports of active exploitation in the wild. The impact is limited to denial of service and does not indicate code execution or data disclosure.
Mitigation Recommendations
Red Hat has released an updated buildah package version 1.41.8-3.el9_7 that addresses this vulnerability. Users of Red Hat Enterprise Linux 9 should apply this update promptly following Red Hat's published guidance at https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:10135
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a16095ce29bf47b506253b8
Added to database: 05/26/2026, 20:58:04 UTC
Last enriched: 07/30/2026, 09:01:23 UTC
Last updated: 07/31/2026, 21:52:54 UTC
Views: 54
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