PT-2026-41964 · Caddy · Caddy

Amemoyoi · CVE-2026-45692 · Published 2026-05-19 · Updated 2026-07-30

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Caddy versions 2.4.0 through 2.11.2

Description An authorization-to-object mismatch exists in the remote admin functionality. The authorization layer uses string prefix matching, while the /config traversal layer parses array indices numerically using the strconv.Atoi() function. This discrepancy allows a remote admin client restricted to a specific path, such as /config/apps/http/servers/srv/routes/0, to access and modify a different array element by using a leading-zero index, such as /config/apps/http/servers/srv/routes/01. In this scenario, the authorization layer accepts the request because it matches the prefix, but the traversal layer resolves the index 01 to numeric index 1, granting unauthorized access to a different configuration object.

Recommendations Update to version 2.11.3. As a temporary workaround, restrict the use of the /config API paths containing numeric array indices for remote admin clients until the update is applied.

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-187

CWE-863

Related Identifiers

CVE-2026-45692

GHSA-X5W9-XH9R-MVFC

GO-2026-5743

OPENSUSE-SU-2026:21483-1

Affected Products

Caddy

References · 1749

• 🔥 https://github.com/caddyserver/caddy/security/advisories/GHSA-x5w9-xh9r-mvfc · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45692.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45692 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-x5w9-xh9r-mvfc · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-45692 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-5743 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-45692 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-45692 · Security Note
• https://ubuntu.com/security/CVE-2026-45692 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-45692 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45692 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:21483-1 · Vendor Advisory
• https://github.com/caddyserver/caddy · Note
• https://suse.com/security/cve/CVE-2025-65797 · Note
• https://suse.com/security/cve/CVE-2026-44427 · Note