Debian debusine up to 0.14.8 Parser unrestricted upload

Summaryinfo

A vulnerability was found in Debian debusine up to 0.14.8. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Parser. The manipulation leads to unrestricted upload. This vulnerability is traded as CVE-2026-11853. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Debian debusine up to 0.14.8 and classified as critical. This issue affects an unknown function of the component Parser. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Debusine is an integrated solution to build, distribute and maintain a Debian-based distribution. Debian source packages (.dsc) and upload artifacts (.changes) are manifest files that name the files that make up the artifact. The parser used to read these files in Debusine accepted arbitrary fully user-controlled paths. The mergeuploads task could be abused to create arbitrary symbolic links on a worker, overwriting any file that the worker user has access to.

It is possible to read the advisory at salsa.debian.org. The identification of this vulnerability is CVE-2026-11853 since 06/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/11/2026). The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 320440 (Linux Distros Unpatched Vulnerability : CVE-2026-11853), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.14.9 eliminates this vulnerability. Applying the patch c24cdc49fb258714767546bdec5b09f8065d414e is able to eliminate this problem. The bugfix is ready for download at salsa.debian.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (320440) and EUVD (EUVD-2026-35999). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Debian

Name

• debusine

Version

• 0.14.0
• 0.14.1
• 0.14.2
• 0.14.3
• 0.14.4
• 0.14.5
• 0.14.6
• 0.14.7
• 0.14.8

License

• open-source

Website

• Vendor: https://www.debian.org/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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