CVE-2026-59157
webhookd is a minimalist webhook server that triggers shell scripts and external processes through HTTP requests.
Impact
webhookd is a minimalist webhook server that triggers shell scripts and external processes through HTTP requests. Prior to 1.22.0, webhookd deployments without htpasswd authentication forwarded all incoming HTTP headers through HTTPParamsToShellVars in pkg/api/index.go into the hook script environment without an allowlist. When an upstream reverse proxy did not strip a client-supplied X-WebAuthn-User header and a hook script trusted that variable for identity or privilege, a remote unauthenticated attacker could spoof another user, bypass script security controls, and access or modify resources available to the impersonated identity. This issue is fixed in version 1.22.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/ncarlier/webhookd | < 1.22.0 | 1.22.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-v25g-mvwr-f5fp
- https://github.com/ncarlier/webhookd/security/advisories/GHSA-v25g-mvwr-f5fp
- https://github.com/ncarlier/webhookd/releases/tag/v1.22.0
- https://github.com/ncarlier/webhookd/commit/5ac66677bf7224191f1dfc51a875b09187d10beb
- https://github.com/ncarlier/webhookd/pull/121