Authenticated environment pollution via reserved argument bypass
Published Aug 21, 2026 · Updated Aug 21, 2026
Improper input validation in OliveTin before 0.0.0-20260531214440-ebffd9f040f7 allows remote authenticated users to alter action environments. filterToDefinedArgumentsOnly retains any unconfigured name beginning ot_, so the value skips type checks and reaches buildEnv and the template context. Permission to trigger an action is required, and impact depends on a command or template consuming an injected OT_ value.
Summary
What happened
Improper input validation in OliveTin before 0.0.0-20260531214440-ebffd9f040f7 allows remote authenticated users to alter action environments. filterToDefinedArgumentsOnly retains any unconfigured name beginning ot_, so the value skips type checks and reaches buildEnv and the template context. Permission to trigger an action is required, and impact depends on a command or template consuming an injected OT_ value.
The record
- CVE
- CVE-2026-53541
- Published
- Aug 21, 2026
- Updated
- Aug 21, 2026
- Vendor
- OliveTin
- Product
- OliveTin
- Classifications
- CWE-20
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 21, 2026CVE publishedPublication date reported by the CVE source.
- Aug 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=<= 2025.03.07
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- StartAction ot_-prefixed argument proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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