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CVE-2026-53541 - OliveTin has Unvalidated `ot_`-prefixed Arguments that Bypass Input Filtering

CVE ID : CVE-2026-53541 Published : Aug. 21, 2026, 11:16 p. m. • 1 hour, 54 minutes ago Description : OliveTin gives access to predefined shell commands from a web interface. The `filterToDefinedArgumentsOnly` function in the executor is intended to discard any arguments not explicitly defined in the action's configuration. However, prior to commit ebffd9f040f791208aee1db2e5a8aecd1e3e603d, a special case allows any argument whose name starts with `ot_` to bypass this filter. While two system arguments (`ot_executionTrackingId` and `ot_username`) are injected by OliveTin and overridden, all other `ot_`-prefixed arguments supplied by the user pass through unmodified.

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