CVE-2026-67438: OliveTin OS Command Injection via Custom regex: Argument Type Bypassing Shell Safety Check

Severity: medium (CVSS 6.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-29 · updated 2026-07-30
Weakness: CWE-78

Description

OliveTin gives access to predefined shell commands from a web interface. From 3000.2.0 until 3000.17.0, the service/internal/executor/arguments.go checkShellArgumentSafety function does not treat regex: custom argument types as unsafe for Shell mode actions, allowing values that pass typeSafetyCheckRegex to be interpolated by wrapCommandInShell into an sh -c command string and enabling OS command injection. This issue is fixed in version 3000.17.0.

Affected products

OliveTin: from 3000.2.0, < 3000.17.0

References

https://github.com/OliveTin/OliveTin/commit/995ff79736f2bccc364448a3ece84087b550b232
https://github.com/OliveTin/OliveTin/releases/tag/3000.17.0
https://github.com/OliveTin/OliveTin/security/advisories/GHSA-xc5w-4v5w-7x65
https://github.com/OliveTin/OliveTin/security/advisories/GHSA-xc5w-4v5w-7x65

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