> CVE-2026-74994 [MEDIUM]

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PUBLISHED
2026-09-01 15:17
MODIFIED
2026-09-01 15:17
CVSS_SCORE V3
6.0
EPSS (Prob. Exploit)
0.63%
Top 50.2%
DATA SOURCES:
NVD đź”— 2026-09-01 RED HAT đź”— 2026-09-06 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-25 OSV đź”— 2026-09-07 MSRC đź”— 2026-09-07

> 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.

> AFFECTED_PRODUCTS

Red Hat - Red Hat Hardened Images
Version: 27.3.4.17

> CVSS V3 METRICS

CVSS_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/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:X

> MÉTRIQUES CVSS DÉTAILLÉES

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:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-863 CWE-1289

> CWE DETAILED DESCRIPTIONS

CWE-863: Incorrect Authorization - The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. | CWE-1289: Improper Validation of Unsafe Equivalence in Input - The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
An update for Red Hat Hardened Images RPMs is now available.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Moderate

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

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

AFFECTED PACKAGES:
Unknown / Unknown
88 versions affected
ALIASES:
EEF-CVE-2026-74994, GHSA-c3cq-q8x6-547g

> HISTORIQUE DES MODIFICATIONS

Première apparition
01/09/2026 15:17
Source: NVD
đź“Š ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-863: Incorrect Authorization - The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. | CWE-1289...
đź“Š ENRICHISSEMENT 06/09/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Moderate", "severity_scale": null }
đź“Š ENRICHISSEMENT 06/09/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 4 weeks ago

> 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
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