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2 vulnerabilities by ncarlier
CVE-2026-59157 (GCVE-0-2026-59157)
Vulnerability from nvd – Published: 2026-09-15 15:46 – Updated: 2026-09-16 15:38
VLAI
EPSS
VEX
Title
webhookd: Unrestricted HTTP Header to Shell Variable Injection
Summary
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.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 15:38 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ncarlier/webhookd/security/adv… | x_refsource_CONFIRM |
| https://github.com/ncarlier/webhookd/pull/121 | x_refsource_MISC |
| https://github.com/ncarlier/webhookd/commit/5ac66… | x_refsource_MISC |
| https://github.com/ncarlier/webhookd/releases/tag… | x_refsource_MISC |
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CVE-2026-59157 (GCVE-0-2026-59157)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:46 – Updated: 2026-09-16 15:38
VLAI
EPSS
VEX
Title
webhookd: Unrestricted HTTP Header to Shell Variable Injection
Summary
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.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 15:38 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ncarlier/webhookd/security/adv… | x_refsource_CONFIRM |
| https://github.com/ncarlier/webhookd/pull/121 | x_refsource_MISC |
| https://github.com/ncarlier/webhookd/commit/5ac66… | x_refsource_MISC |
| https://github.com/ncarlier/webhookd/releases/tag… | x_refsource_MISC |
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