CVE-2026-74994

medium

Description

The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one protected directory is accepted as valid for all other protected directories on the same server instance. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

References

https://osv.dev/vulnerability/EEF-CVE-2026-74994

https://github.com/erlang/otp/security/advisories/GHSA-c3cq-q8x6-547g

https://github.com/erlang/otp/commit/c5ccec8ed25c70ec6557fd81277e4b2f52285c19

https://github.com/erlang/otp/commit/6982e381137ede21a4e1faf5fa2dd82321691176

https://github.com/erlang/otp/commit/6101cb74ff2870718c622ba7af0c100f7f2524e3

https://cna.erlef.org/cves/CVE-2026-74994.html

Details

Source: Mitre, NVD

Published: 2026-09-01

Updated: 2026-09-01

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 6

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00364