- Issued:
- 2026-03-17
- Updated:
- 2026-03-17
RHSA-2026:4753 - Security Advisory
Synopsis
Important: osbuild-composer security update
Type/Severity
Security Advisory: Important
Red Hat Lightspeed patch analysis
Identify and remediate systems affected by this advisory.
Topic
An update for osbuild-composer is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building images for local usage, it can also upload images directly to cloud. It is compatible with composer-cli and cockpit-composer clients.
Security Fix(es):
- crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729)
- golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)
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.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
Affected Products
- Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.8 x86_64
- Red Hat Enterprise Linux Server - TUS 8.8 x86_64
- Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.8 ppc64le
- Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.8 x86_64
Fixes
- BZ - 2418462 - CVE-2025-61729 crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate
- BZ - 2434432 - CVE-2025-61726 golang: net/url: Memory exhaustion in query parameter parsing in net/url
Note:
More recent versions of these packages may be available.
Click a package name for more details.
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.8
| SRPM | |
|---|---|
| osbuild-composer-75-7.el8_8.src.rpm | SHA-256: a05b49e97d5ce02f5156bcfb3e3d90314a09219bb1fe60b981d2c7af0b06c4fe |
| x86_64 | |
| osbuild-composer-75-7.el8_8.x86_64.rpm | SHA-256: 0b7708fbf0f007c14e44d7a8797ba513b2b924469823f9cfb0324ac8002257f0 |
| osbuild-composer-core-75-7.el8_8.x86_64.rpm | SHA-256: 66d762d164803430ff7c29fe61bc031a76e0711e33c93f564cc49c991b90d05e |
| osbuild-composer-core-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 8f490679e2528552450abb65946ab96d37d9b2c450e20718533887a5bbf068cb |
| osbuild-composer-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 3c503c1a992c109f2d285bbd3e76328db060fc6cb814202ba6648fedda14e1db |
| osbuild-composer-debugsource-75-7.el8_8.x86_64.rpm | SHA-256: 0ed1d032a501c06c055d180370d6d860a3b3c9f5d489eed3f2cc8026eddcd28b |
| osbuild-composer-dnf-json-75-7.el8_8.x86_64.rpm | SHA-256: f6169e8a9c2b289bdc1e4911da7d704b393a2180373d965ef27fb3b2f9d871fb |
| osbuild-composer-tests-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 7427a948ecb163b83261ecc0157df63bca0b6884cb439eae86622dad4c8dd40f |
| osbuild-composer-worker-75-7.el8_8.x86_64.rpm | SHA-256: e5147cf0b22396ac5b9a7d06bf41d8b350f56764454b6f3c9b714cc583a41499 |
| osbuild-composer-worker-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 3b27fb7ec546880775c54cb41d2da41d4190c2a0100ca44667da065f600b380a |
Red Hat Enterprise Linux Server - TUS 8.8
| SRPM | |
|---|---|
| osbuild-composer-75-7.el8_8.src.rpm | SHA-256: a05b49e97d5ce02f5156bcfb3e3d90314a09219bb1fe60b981d2c7af0b06c4fe |
| x86_64 | |
| osbuild-composer-75-7.el8_8.x86_64.rpm | SHA-256: 0b7708fbf0f007c14e44d7a8797ba513b2b924469823f9cfb0324ac8002257f0 |
| osbuild-composer-core-75-7.el8_8.x86_64.rpm | SHA-256: 66d762d164803430ff7c29fe61bc031a76e0711e33c93f564cc49c991b90d05e |
| osbuild-composer-core-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 8f490679e2528552450abb65946ab96d37d9b2c450e20718533887a5bbf068cb |
| osbuild-composer-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 3c503c1a992c109f2d285bbd3e76328db060fc6cb814202ba6648fedda14e1db |
| osbuild-composer-debugsource-75-7.el8_8.x86_64.rpm | SHA-256: 0ed1d032a501c06c055d180370d6d860a3b3c9f5d489eed3f2cc8026eddcd28b |
| osbuild-composer-dnf-json-75-7.el8_8.x86_64.rpm | SHA-256: f6169e8a9c2b289bdc1e4911da7d704b393a2180373d965ef27fb3b2f9d871fb |
| osbuild-composer-tests-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 7427a948ecb163b83261ecc0157df63bca0b6884cb439eae86622dad4c8dd40f |
| osbuild-composer-worker-75-7.el8_8.x86_64.rpm | SHA-256: e5147cf0b22396ac5b9a7d06bf41d8b350f56764454b6f3c9b714cc583a41499 |
| osbuild-composer-worker-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 3b27fb7ec546880775c54cb41d2da41d4190c2a0100ca44667da065f600b380a |
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.8
| SRPM | |
|---|---|
| osbuild-composer-75-7.el8_8.src.rpm | SHA-256: a05b49e97d5ce02f5156bcfb3e3d90314a09219bb1fe60b981d2c7af0b06c4fe |
| ppc64le | |
| osbuild-composer-75-7.el8_8.ppc64le.rpm | SHA-256: 43dd6cf4a944dfed6d1bc786573f0c9950e15f364331b5ef7cb2e4848dcd361b |
| osbuild-composer-core-75-7.el8_8.ppc64le.rpm | SHA-256: 1b6699393c5f4fdf30846f1006c53eba37f0c973ff11ca892d9c1638276b7a7d |
| osbuild-composer-core-debuginfo-75-7.el8_8.ppc64le.rpm | SHA-256: 93cbd0b05323fd544778f9e45bb79a2af71d26c196c9238e8bb0cd15a68f131f |
| osbuild-composer-debuginfo-75-7.el8_8.ppc64le.rpm | SHA-256: 56c9c29056b9ca2a0213a9a73d3fb2b09af355cd456a78155c14fca721ba4937 |
| osbuild-composer-debugsource-75-7.el8_8.ppc64le.rpm | SHA-256: 6d5b5a1d19d72b48f724c75351105f5e08f567d06939da345c3ea85cf9200958 |
| osbuild-composer-dnf-json-75-7.el8_8.ppc64le.rpm | SHA-256: a571566298c0224c3ad3cfa4c5cf241683b46a82163afb4d2a85d3ab4274504a |
| osbuild-composer-tests-debuginfo-75-7.el8_8.ppc64le.rpm | SHA-256: cca617d7685d89cf24cde71824dd5ebccc3885c472a9afd58adb8bd14a4fc58d |
| osbuild-composer-worker-75-7.el8_8.ppc64le.rpm | SHA-256: 4f3a705d2ad19503d0dc37610a296e8afd619546c60c4c7c5006ac84ed602b28 |
| osbuild-composer-worker-debuginfo-75-7.el8_8.ppc64le.rpm | SHA-256: df93ebb08295063c207753da4ba30113ebfe0fac5f72572b682be0fb699238d1 |
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.8
| SRPM | |
|---|---|
| osbuild-composer-75-7.el8_8.src.rpm | SHA-256: a05b49e97d5ce02f5156bcfb3e3d90314a09219bb1fe60b981d2c7af0b06c4fe |
| x86_64 | |
| osbuild-composer-75-7.el8_8.x86_64.rpm | SHA-256: 0b7708fbf0f007c14e44d7a8797ba513b2b924469823f9cfb0324ac8002257f0 |
| osbuild-composer-core-75-7.el8_8.x86_64.rpm | SHA-256: 66d762d164803430ff7c29fe61bc031a76e0711e33c93f564cc49c991b90d05e |
| osbuild-composer-core-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 8f490679e2528552450abb65946ab96d37d9b2c450e20718533887a5bbf068cb |
| osbuild-composer-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 3c503c1a992c109f2d285bbd3e76328db060fc6cb814202ba6648fedda14e1db |
| osbuild-composer-debugsource-75-7.el8_8.x86_64.rpm | SHA-256: 0ed1d032a501c06c055d180370d6d860a3b3c9f5d489eed3f2cc8026eddcd28b |
| osbuild-composer-dnf-json-75-7.el8_8.x86_64.rpm | SHA-256: f6169e8a9c2b289bdc1e4911da7d704b393a2180373d965ef27fb3b2f9d871fb |
| osbuild-composer-tests-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 7427a948ecb163b83261ecc0157df63bca0b6884cb439eae86622dad4c8dd40f |
| osbuild-composer-worker-75-7.el8_8.x86_64.rpm | SHA-256: e5147cf0b22396ac5b9a7d06bf41d8b350f56764454b6f3c9b714cc583a41499 |
| osbuild-composer-worker-debuginfo-75-7.el8_8.x86_64.rpm | SHA-256: 3b27fb7ec546880775c54cb41d2da41d4190c2a0100ca44667da065f600b380a |
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