CVE record · CVE-2026-66835

httpd mod_auth directory protection bypassed by a doubled slash in the request path

CVSS 8.2 HighEPSS 0.0097 · 62nd percentile

Published by the CVE Program (CNA: EEF) at 1 Sept 2026, 14:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Erlang	OTP Package name: otp pkg:software-id/erlang.org/otp	unknown before 17.0 otp affected 17.0 to before 27.3.4.17 otp affected 28.0 to before 28.5.0.6 otp affected 29.0 to before 29.0.6 otp Other versions: unaffected
Erlang	OTP Package name: inets pkg:otp/inets	unknown before 5.10 otp affected 5.10 to before 9.3.2.7 otp affected 9.4 to before 9.6.2.3 otp affected 9.7 to before 9.7.2 otp Other versions: unaffected
Erlang	OTP Package name: erlang/otp https://github.com pkg:github/erlang/otp	affected 84adefa331c4159d432d22840663c38f155cd4c1 to before * git Other versions: unaffected

Identifiers: CVE-2026-66835
CNA: EEF
Weakness (CWE): CWE-50
Tags: Erlang OTP
CWE-50
Published: 1 Sept 2026
Updated: 8 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.2	High	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0097, the 62nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 1 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/erlang/otp/security/advisories/GHSA-r4vv-vc2c-2fw6 vendor-advisoryrelated
cna.erlef.org/cves/CVE-2026-66835.html related
osv.dev/vulnerability/EEF-CVE-2026-66835 related
www.erlang.org/doc/system/versions.html#order-of-versions version-scheme
github.com/erlang/otp/commit/bac19eb3dbd96cc49b6d8cabc1c04248bf8c79f6 patch
github.com/erlang/otp/commit/d8878dec0ececc2eab18e47bb18b472f224ca633 patch
github.com/erlang/otp/commit/9641944a2efbf55bea760f8ff7ba777fe3a0961c patch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.