HIGHFixed upstream

CVE-2026-66835

Erlang/OTP inets httpd mod_auth bypass with a doubled slash

Technology

Erlang/OTP

CVSS Score

8.2 / 10.0

Affected Versions

OTP 17.0 and later, before 27.3.4.17, 28.5.0.6 and 29.0.6 (inets)

Upstream Fix

OTP 27.3.4.17, 28.5.0.6, 29.0.6

Published

September 1, 2026

OSSeva Coverage

Fixed upstream

Description

inets httpd does not collapse empty path segments, so prefixing the request path with an extra slash lets a remote, unauthenticated attacker read files inside a directory that mod_auth protects.

Upstream record: NVD · CVE.org

Is your Erlang/OTP deployment affected?

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