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, OTP 28.5.0.6, and OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.
Metrics
CVSS 4.0 6.0/10
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Erlang | OTP | >= 17.0, < * |
| Erlang | OTP | >= 5.10, < * |
| Erlang | OTP | >= 84adefa331c4159d432d22840663c38f155cd4c1, < * |
References
- https://cna.erlef.org/cves/CVE-2026-74994.html
- https://github.com/erlang/otp/commit/6101cb74ff2870718c622ba7af0c100f7f2524e3
- https://github.com/erlang/otp/commit/6982e381137ede21a4e1faf5fa2dd82321691176
- https://github.com/erlang/otp/commit/c5ccec8ed25c70ec6557fd81277e4b2f52285c19
- https://github.com/erlang/otp/security/advisories/GHSA-c3cq-q8x6-547g
- https://osv.dev/vulnerability/EEF-CVE-2026-74994
- https://www.erlang.org/doc/system/versions.html#order-of-versions
Timeline
- Published
- Sep 1, 2026
- Last modified
- Nov 11, 2026
- NVD status
- Deferred