Detect CVE-2026-52806: Gogs RCE via git rebase --exec Argument Injection in PR Merge in CrowdStrike LogScale
Detects exploitation of CVE-2026-52806, a critical command injection vulnerability (CWE-77) in Gogs versions prior to 0.14.3. An attacker can inject arbitrary shell commands via the git rebase --exec argument during pull request merge operations, leading to remote code execution on the Gogs server. A public PoC is available.
MITRE ATT&CK
- Tactic
- Execution Persistence Lateral Movement
LogScale Detection Query
#event_simpleName = ProcessRollup2
| where ImageFileName matches regex ".*git(\.exe)?$"
and CommandLine matches regex "rebase.*--exec"
OR (
ParentBaseFileName in ("gogs", "gogs.exe")
and ImageFileName matches regex ".*(bash|sh|curl|wget|nc|ncat|python[0-9.]*|perl|cmd\.exe|powershell\.exe)$"
)
| eval InjectionType = case(
CommandLine matches regex "--exec[= ]['"]?[^'"]*[;&|`$]", "ArgumentInjection",
ParentBaseFileName in ("gogs", "gogs.exe"), "SuspiciousChildFromGogs",
"Unknown"
)
| table timestamp, ComputerName, UserName, ParentBaseFileName, ImageFileName, CommandLine, InjectionType
| sort timestamp descCrowdStrike Falcon Logscale (CQL) query detecting git rebase --exec command injection and suspicious process spawning from Gogs parent processes using ProcessRollup2 telemetry.
Data Sources
Required Tables
False Positives & Tuning
- Developers running git rebase --exec on workstations where Gogs is installed and the CrowdStrike sensor is deployed
- Legitimate scheduled tasks running under the Gogs service account that spawn utilities like curl for health checks
- Authorized red team exercises testing Gogs exploitation chains in lab environments with sensor coverage
Other platforms for CVE-2026-52806
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Simulate git rebase --exec argument injection via crafted PR branch name
Expected signal: Process creation event: git with args [rebase, --exec, id > /tmp/cve_rce_proof.txt, target]; child process creation: sh -c 'id > /tmp/cve_rce_proof.txt'; file creation event at /tmp/cve_rce_proof.txt
- Test 2Gogs suspicious child process simulation — reverse shell via curl
Expected signal: Process creation event showing bash or curl with parent process name 'gogs'; network connection attempt from gogs-named process to 127.0.0.1:9999
- Test 3Persistence via cron injection post-Gogs RCE simulation
Expected signal: Process creation: git rebase --exec with crontab modification command; crontab process invocation; file write to /tmp/cve_persist_marker.txt; audit log entry for crontab modification
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