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TI-2026-38614 Aliases CVE-2026-53541GHSA-prj9-97mp-mwh2

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

Priority MEDIUM 53CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0038 32nd percentileScored 2026-11-07
Fix Fixed github.com/OliveTin/OliveTin (Go): 0.0.0-20260531214440-ebffd9f040f7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OliveTinOliveTinup to 2025.03.07—No fix listedCNA
—github.com/OliveTin/OliveTin (Go)before 0.0.0-20260531214440-ebffd9f040f70.0.0-20260531214440-ebffd9f040f7Patch availableGHSA-prj9-97mp-mwh2
  • OliveTin VendorOliveTin Affected up to 2025.03.07 Fixed in — No fix listed CNA
  • github.com/OliveTin/OliveTin (Go) Vendor— Affected before 0.0.0-20260531214440-ebffd9f040f7 Fixed in 0.0.0-20260531214440-ebffd9f040f7 Patch available GHSA-prj9-97mp-mwh2

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:olivetin:olivetin:*:*:*:*:*:*:*:*——OliveTin
  • cpe:2.3:a:olivetin:olivetin:*:*:*:*:*:*:*:* Versions — — ·OliveTin

Remediation

  • Fix · GHSA-prj9-97mp-mwh2 github.com/OliveTin/OliveTin (Go) Fixed in 0.0.0-20260531214440-ebffd9f040f7 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53541
  2. 2026-10-03 Alias added: GHSA-prj9-97mp-mwh2

References

Other 3

  • TI-2026-23456 OliveTin: JWT Audience Validation Bypass in Local Key and HMAC Modes CVSS 3.1HIGH 8.8
  • TI-2026-22008 OS command injection in OliveTin CVSS 3.1CRITICAL 10.0
  • TI-2026-47717 OliveTin: Unauthenticated DoS via OAuth2 State Memory Exhaustion (Unbounded Map Growth) CVSS 3.1HIGH 7.5
  • TI-2026-22985 OliveTin: Unauthenticated Action Termination via KillAction When Guests Must Login CVSS 3.1HIGH 7.5
  • TI-2026-22984 OliveTin: Unauthenticated DoS via concurrent map writes in OAuth2 state handling CVSS 3.1HIGH 7.5
  • TI-2026-22627 OliveTin: Unauthenticated Denial of Service via Memory Exhaustion in PasswordHash API Endpoint CVSS 3.1HIGH 7.5
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences