CVE-2026-56004 obs-service-tar_scm: command injection via mercurial handler
Attackers can execute arbitrary code by providing a malicious _service file to the mercurial handler in the Open Build Service tar_scm source service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-56004?
CVE-2026-56004 is a critical command injection vulnerability in openSUSE buildservice, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A shellcode injection in the mercurial handler of the obs tar_scm source service before version 0.12.4 could be used by attackers able to provide a _service file to execute code as the source service or the local user checking out the malicious services
Weakness: CWE-78
Which versions are affected by CVE-2026-56004?
Linux distribution packages (1)
obs-service-tar_scm openSUSE:Tumbleweed | All versions | 0.12.4-1.1 |
How do I fix CVE-2026-56004?
Upgrade to a fixed version.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-56004 being exploited?
There is no known exploitation of CVE-2026-56004 in the wild and no public exploit code.
Sources
Also known as GHSA-f3xh-pcqp-fpcm, openSUSE-SU-2026:11189-1.