What is CVE-2026-45135?

CVE-2026-45135 is a high-severity vulnerability in Caddyserver Caddy, classified under Improper Input Validation. CVSS score: 8.1/10. Published 2026-06-23.

How severe is CVE-2026-45135?

High severity. CVSS v3 base score is 8.1 out of 10.

Improper input validation in Caddyserver Caddy

CVE-2026-45135

Caddy is an extensible server platform that uses TLS by default. From 2.7.0 until 2.11.3, the FastCGI transport's splitPos() in modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go misuses golang.org/x/text/search with search.IgnoreCase when…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Caddyserver Caddy — versions >= 2.7.0, < 2.11.3

Weakness classification (CWE)

CWE-20 — Improper Input Validation
CWE-176
CWE-178 — Improper Handling of Case Sensitivity

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45135?: CVE-2026-45135 is a high-severity vulnerability in Caddyserver Caddy, classified under Improper Input Validation. CVSS score: 8.1/10. Published 2026-06-23.
How severe is CVE-2026-45135?: High severity. CVSS v3 base score is 8.1 out of 10.