CVE-2026-53541
OliveTin gives access to predefined shell commands from a web interface.
Published Aug 21, 2026 · corrected/updated Oct 14, 2026 · evidence confidence high
OliveTin gives access to predefined shell commands from a web interface. The 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 to bypass this filter. While two system arguments ( and ) are injected by OliveTin and overridden, all other -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 -prefixed arguments skip all type safety checks entirely; set as environment variables — via , with completely unvalidated values, and passed to the executed command; and included in the template context — available as in template rendering. Commit ebffd9f040f791208aee1db2e5a8aecd1e3e603d contains a patch.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-53541 is a medium public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected version ranges have not been ingested yet. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 4.3, EPSS 0.4%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-20. Sources contributing to this record: cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Aug 21, 2026 · NIST NVD
Detected
OliveTin gives access to predefined shell commands from a web interface. The 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 to bypass this filter. While two system arguments ( and ) are injected by OliveTin
Oct 14, 2026 · NIST NVD
Updated
OliveTin gives access to predefined shell commands from a web interface. The 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 to bypass this filter. While two system arguments ( and ) are injected by OliveTin
Sources
- CVE.orgVulnerability recordCVE-2026-53541
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-53541
30-day exploitation probability 0.4%
first.org - NIST NVDVulnerability recordCVE-2026-53541
OliveTin gives access to predefined shell commands from a web interface. The function in the executor is intended to discard any arguments not explicitly defined in the action's configuration. However, prior to commit ebffd9f040f791208aee1db2e5a8aec
nvd.nist.gov