Riskcovery

CVE-2026-74994

inets, httpd: Authentication Bypass via Directory Namespace Collapse in httpd mod_auth

State
Published
Severity
6.0 Medium
Published
Sep 1, 2026
Updated
Sep 8, 2026
Reserved
Aug 17, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.06.0 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NEEF

Weaknesses

  • CWE-863 Incorrect Authorization
  • CWE-1289 Improper Validation of Unsafe Equivalence in Input

Affected Products

ProductVersions
OTPErlang
  • before 17.0Unknown
  • 17.0 to before 27.3.4.17Affected
  • 28.0 to before 28.5.0.6Affected
  • 29.0 to before 29.0.6Affected
OTPErlang
  • before 5.10Unknown
  • 5.10 to before 9.3.2.7Affected
  • 9.4 to before 9.6.2.3Affected
  • 9.7 to before 9.7.2Affected
OTPErlang
  • 84adefa331c4159d432d22840663c38f155cd4c1 and laterAffectedfrom 6982e381137ede21a4e1faf5fa2dd82321691176Not affectedfrom c5ccec8ed25c70ec6557fd81277e4b2f52285c19Not affectedfrom 6101cb74ff2870718c622ba7af0c100f7f2524e3Not affected

References

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