CVE-2026-66835
CVE-2026-66835: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-66835] Erlang/OTP inets httpd: Directory protection bypass allows information disclosure
CVE-2026-66835Source published Source updated
Path Equivalence vulnerability in Erlang/OTP inets httpd allows a remote unauthenticated attacker to read files inside a mod_auth protected directory by prefixing the request path with an extra slash. httpd_request:validate_uri/1 normalises the request URI with uri_string:normalize/1, which performs RFC 3986 dot-segment removal but does not collapse empty path segments, so a doubled slash survives. mod_alias:real_name/3 concatenates the document root with that URI, and mod_auth:secret_path/3 then decides whether the result lies inside a protected directory block by running the configured directory path as an unanchored regular expression against it. The doubled slash breaks the contiguous substring the regex needs, so the request is treated as unprotected and no authentication challenge…
- Affected products in this advisory
- Red Hat Hardened Images
- Source-reported affected versions
- < 17.0
- < 27.3.4.17
- < 28.0
- < 28.5.0.6
8 more entries in the full advisory.
- Source-reported fixed versions
- erlang27-main-27.3.4.17-0.1.hum1
- RHSA-2026:62531
- Mitigation guidance
- To mitigate this issue, restrict network access to the Erlang/OTP inets httpd instance to trusted clients only. Alternatively, deploy a reverse proxy in front of the inets httpd that normalizes doubled slashes in request paths before forwarding, such as configuring nginx with its default merge_slashes directive. If inets httpd is not required, consider disabling the service. If the service is active, ensure that sensitive content is served through explicitly authenticated handlers rather than relying solely on mod_auth directory-block matching.
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