Arbitrary Symbolic Link Vulnerability in Debusine by Freexian
CVE-2026-11853

6.5MEDIUM

Key Information:

Vendor

Debian
Status
Debusine
Vendor
CVE Published:
10 June 2026

What is CVE-2026-11853?

Debusine, an integrated solution for building and maintaining Debian-based distributions, has a vulnerability in its handling of Debian source packages (.dsc) and upload artifacts (.changes). The parser erroneously accepts user-controlled paths, which can be exploited in the mergeuploads task. This flaw allows unauthorized creation of symbolic links on a worker, leading to potential overwrites of accessible files. Users should review their deployments to mitigate the associated risks.

Affected Version(s)

debusine 0.12.0 < 0.14.9

References

https://salsa.debian.org/freexian-team/debusine/-/work_it...
https://salsa.debian.org/freexian-team/debusine/-/merge_r...
https://salsa.debian.org/freexian-team/debusine/-/commit/...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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