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CVE-2026-56004 is a high-severity command injection flaw in the Mercurial handler of the OBS tar_scm source service (obs-service-tar_scm). Versions prior to 0.12.4 are affected. The issue is described as a shellcode injection vulnerability triggered when processing a malicious _service file. An attacker who can supply such a _service file can cause the vulnerable handler to execute attacker-controlled code during service processing or checkout operations.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.