{"cve":"CVE-2026-53541","nvd":{"published":"2026-08-21T23:16:26.500","modified":"2026-10-14T19:10:00.297","status":"Deferred","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. These bypassed arguments are not type-checked — the validation loop only iterates over the action's defined arguments, so `ot_`-prefixed arguments skip all type safety checks entirely; set as environment variables — via `buildEnv()`, with completely unvalidated values, and passed to the executed command; and included in the template context — available as `.Arguments.ot_*` in template rendering. Commit ebffd9f040f791208aee1db2e5a8aecd1e3e603d contains a patch.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-20"],"references":["https://github.com/OliveTin/OliveTin/commit/ebffd9f040f791208aee1db2e5a8aecd1e3e603d","https://github.com/OliveTin/OliveTin/security/advisories/GHSA-prj9-97mp-mwh2","https://github.com/OliveTin/OliveTin/security/advisories/GHSA-prj9-97mp-mwh2"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-53541","score":0.0038,"percentile":0.31735,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-prj9-97mp-mwh2","url":"https://osv.dev/vulnerability/GHSA-prj9-97mp-mwh2","summary":"OliveTin has Unvalidated `ot_`-prefixed Arguments that Bypass Input Filtering","modified":"2026-06-25T23:11:17.575984644Z","packages":[{"ecosystem":"Go","name":"github.com/OliveTin/OliveTin","purl":"pkg:golang/github.com/OliveTin/OliveTin","ranges":["<0.0.0-20260531214440-ebffd9f040f7"],"fixed":["0.0.0-20260531214440-ebffd9f040f7"]}]},{"id":"GO-2026-5552","url":"https://osv.dev/vulnerability/GO-2026-5552","summary":"OliveTin has Unvalidated `ot_`-prefixed Arguments that Bypass Input Filtering in github.com/OliveTin/OliveTin","modified":"2026-06-25T23:01:30.531190337Z","packages":[{"ecosystem":"Go","name":"github.com/OliveTin/OliveTin","purl":"pkg:golang/github.com/OliveTin/OliveTin","ranges":["<0.0.0-20260531214440-ebffd9f040f7"],"fixed":["0.0.0-20260531214440-ebffd9f040f7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}