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TI-2026-22008 Aliases CVE-2026-27626GHSA-49gm-hh7w-wfvf

OS command injection in OliveTin

Priority HIGH 76CWE-78Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

OliveTin gives access to predefined shell commands from a web interface. In versions up to and including 3000.10.0, OliveTin's shell mode safety check (`checkShellArgumentSafety`) blocks several dangerous argument types but not `password`. A user supplying a `password`-typed argument can inject shell metacharacters that execute arbitrary OS commands. A second independent vector allows unauthenticated RCE via webhook-extracted JSON values that skip type safety checks entirely before reaching `sh -c`. When exploiting vector 1, any authenticated user (registration enabled by default, `authType: none` by default) can execute arbitrary OS commands on the OliveTin host with the permissions of the OliveTin process. When exploiting vector 2, an unauthenticated attacker can achieve the same if the instance receives webhooks from external sources, which is a primary OliveTin use case. When an attacker exploits both vectors, this results in unauthenticated RCE on any OliveTin instance using Shell mode with webhook-triggered actions. As of time of publication, a patched version is not available.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00637 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/OliveTin/OliveTin (Go): 0.0.0-20260222101908-4bbd2eab1532

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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 3000.10.0—No fix listedCNA
—github.com/OliveTin/OliveTin (Go)before 0.0.0-20260222101908-4bbd2eab15320.0.0-20260222101908-4bbd2eab1532Patch availableGHSA-49gm-hh7w-wfvf
  • OliveTin VendorOliveTin Affected up to 3000.10.0 Fixed in — No fix listed CNA
  • github.com/OliveTin/OliveTin (Go) Vendor— Affected before 0.0.0-20260222101908-4bbd2eab1532 Fixed in 0.0.0-20260222101908-4bbd2eab1532 Patch available GHSA-49gm-hh7w-wfvf

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:olivetin:olivetin:*:*:*:*:*:*:*:*up to 3000.10.0VulnerableOliveTin
  • cpe:2.3:a:olivetin:olivetin:*:*:*:*:*:*:*:* Versions up to 3000.10.0 Vulnerable ·OliveTin

Remediation

  • Fix · GHSA-49gm-hh7w-wfvf github.com/OliveTin/OliveTin (Go) Fixed in 0.0.0-20260222101908-4bbd2eab1532 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27626
  2. 2026-10-03 Alias added: GHSA-49gm-hh7w-wfvf
  3. 2026-10-14 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

Other 3

  • TI-2026-23456 OliveTin: JWT Audience Validation Bypass in Local Key and HMAC Modes CVSS 3.1HIGH 8.8
  • 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
  • TI-2026-24370 OliveTin's unsafe parsing of UniqueTrackingId can be used to write files CVSS 3.1HIGH 8.5
  • TI-2025-32274 OS Command Injection in Olivetin 2025.4.22 Custom Themes via the ParseRequestURI function… CVSS 3.1MEDIUM 6.5
See all 10 →

Sources

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