CVE-2026-27589 (GCVE-0-2026-27589)

Vulnerability from cvelistv5 – Published: 2026-02-24 16:30 – Updated: 2026-02-24 16:31
VLAI?
Title
Caddy vulnerable to cross-origin config application via local admin API /load (caddy)
Summary
Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen `127.0.0.1:2019`) exposes a state-changing `POST /load` endpoint that replaces the entire running configuration. When origin enforcement is not enabled (`enforce_origin` not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.
Severity ?
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
CWE
  • CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
Impacted products
Vendor Product Version
caddyserver caddy Affected: < 2.11.1
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      "source": {
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        "discovery": "UNKNOWN"
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      "title": "Caddy vulnerable to cross-origin config application via local admin API /load (caddy)"
    }
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  "cveMetadata": {
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    "cveId": "CVE-2026-27589",
    "datePublished": "2026-02-24T16:30:52.016Z",
    "dateReserved": "2026-02-20T17:40:28.450Z",
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    "state": "PUBLISHED"
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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