FKIE_CVE-2026-28808

Vulnerability from fkie_nvd - Published: 2026-04-07 13:16 - Updated: 2026-10-26 22:10
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
Incorrect Authorization vulnerability in Erlang OTP (inets modules) allows unauthenticated access to CGI scripts protected by directory rules when served via script_alias. When script_alias maps a URL prefix to a directory outside DocumentRoot, mod_auth evaluates directory-based access controls against the DocumentRoot-relative path while mod_cgi executes the script at the ScriptAlias-resolved path. This path mismatch allows unauthenticated access to CGI scripts that directory rules were meant to protect. This vulnerability is associated with program files lib/inets/src/http_server/mod_alias.erl, lib/inets/src/http_server/mod_auth.erl, and lib/inets/src/http_server/mod_cgi.erl. This issue affects OTP from OTP 17.0 before OTP 26.2.5.19, OTP 27.3.4.10, and OTP 28.4.2, corresponding to inets from 5.10 before 9.1.0.6, 9.3.2.4, and 9.6.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.
References
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://cna.erlef.org/cves/CVE-2026-28808.htmlMitigation, Vendor Advisory
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/erlang/otp/commit/07b8f441ca711f9812fad9e9115bab3c3aa92f79
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/erlang/otp/commit/8fc71ac6af4fbcc54103bec2983ef22e82942688Patch
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/erlang/otp/commit/9dfa0c51eac97866078e808dec2183cb7871ff7cPatch
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/erlang/otp/security/advisories/GHSA-3vhp-h532-mc3fThird Party Advisory
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://osv.dev/vulnerability/EEF-CVE-2026-28808Patch, Third Party Advisory
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://www.erlang.org/doc/system/versions.html#order-of-versionsProduct
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-28808
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2455909
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28808.json
Impacted products
Vendor Product Version
erlang erlang\/inets *
erlang erlang\/inets *
erlang erlang\/inets *
erlang erlang\/otp *
erlang erlang\/otp *
erlang erlang\/otp *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
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          "packageURL": "pkg:software-id/erlang.org/otp",
          "product": "OTP",
          "programFiles": [
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            "lib/inets/src/http_server/mod_auth.erl",
            "lib/inets/src/http_server/mod_cgi.erl"
          ],
          "vendor": "Erlang",
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          "defaultStatus": "unknown",
          "packageName": "inets",
          "packageURL": "pkg:otp/inets?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp\u0026vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
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            "src/http_server/mod_auth.erl",
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          "vendor": "Erlang",
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                  "status": "unaffected"
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                {
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              "versionType": "git"
            }
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  "configurations": [
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              "matchCriteriaId": "9A8568B7-8E4D-46D4-BC89-E90031B0E3A5",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Incorrect Authorization vulnerability in Erlang OTP (inets modules) allows unauthenticated access to CGI scripts protected by directory rules when served via script_alias.\n\nWhen script_alias maps a URL prefix to a directory outside DocumentRoot, mod_auth evaluates directory-based access controls against the DocumentRoot-relative path while mod_cgi executes the script at the ScriptAlias-resolved path. This path mismatch allows unauthenticated access to CGI scripts that directory rules were meant to protect.\n\nThis vulnerability is associated with program files lib/inets/src/http_server/mod_alias.erl, lib/inets/src/http_server/mod_auth.erl, and lib/inets/src/http_server/mod_cgi.erl.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a026.2.5.19, OTP\u00a027.3.4.10, and OTP\u00a028.4.2, corresponding to inets from 5.10 before 9.1.0.6, 9.3.2.4, and 9.6.2. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de autorizaci\u00f3n incorrecta en Erlang OTP (m\u00f3dulos inets) permite acceso no autenticado a scripts CGI protegidos por reglas de directorio cuando se sirven a trav\u00e9s de script_alias.\n\nCuando script_alias mapea un prefijo de URL a un directorio fuera de DocumentRoot, mod_auth eval\u00faa los controles de acceso basados en directorio contra la ruta relativa a DocumentRoot mientras mod_cgi ejecuta el script en la ruta resuelta por ScriptAlias. Esta falta de coincidencia de rutas permite acceso no autenticado a scripts CGI que las reglas de directorio estaban destinadas a proteger.\n\nEsta vulnerabilidad est\u00e1 asociada con los archivos de programa lib/inets/src/http_server/mod_alias.erl, lib/inets/src/http_server/mod_auth.erl, y lib/inets/src/http_server/mod_cgi.erl.\n\nEste problema afecta a OTP desde OTP 17.0 hasta OTP 28.4.2, 27.3.4.10 y 26.2.5.19 correspondiente a inets desde 5.10 hasta 9.6.2, 9.3.2.4 y 9.1.0.6."
    }
  ],
  "id": "CVE-2026-28808",
  "lastModified": "2026-10-26T22:10:00.163",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
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          "baseScore": 7.4,
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          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
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          "attackRequirements": "PRESENT",
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          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/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",
          "version": "4.0",
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          "role": "CISA Coordinator",
          "timestamp": "2026-04-07T13:14:10.515632Z",
          "version": "2.0.3"
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  "published": "2026-04-07T13:16:46.320",
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  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Modified",
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          "value": "CWE-863"
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    }
  ]
}



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