CVE-2026-28808

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Source
https://cve.org/CVERecord?id=CVE-2026-28808
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28808.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-28808
Aliases
Downstream
Related
Published
2026-04-07T12:28:16.056Z
Modified
2026-07-16T03:31:17.216586801Z
Severity
  • 8.3 (High) CVSS_V4 - 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 CVSS Calculator
Summary
ScriptAlias CGI targets bypass directory auth in inets httpd (mod_auth vs mod_cgi path mismatch)
Details

Incorrect Authorization vulnerability in Erlang OTP (inets modules) allows unauthenticated access to CGI scripts protected by directory rules when served via script_alias.

When scriptalias maps a URL prefix to a directory outside DocumentRoot, modauth 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/httpserver/modalias.erl, lib/inets/src/httpserver/modauth.erl, and lib/inets/src/httpserver/modcgi.erl.

This issue affects OTP from OTP 17.0 until OTP 28.4.2, 27.3.4.10 and 26.2.5.19 corresponding to inets from 5.10 until 9.6.2, 9.3.2.4 and 9.1.0.6.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-863"
    ],
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "5.10"
                },
                {
                    "fixed": "*"
                },
                {
                    "introduced": "17.0"
                },
                {
                    "fixed": "*"
                },
                {
                    "introduced": "07b8f441ca711f9812fad9e9115bab3c3aa92f79"
                },
                {
                    "fixed": "*"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28808.json"
}
References

Affected packages

Git / github.com/erlang/otp

Affected ranges

Type
GIT
Repo
https://github.com/erlang/otp
Events
Introduced
07b8f441ca711f9812fad9e9115bab3c3aa92f79
Fixed
cdb375af6b456946b1ff3fc993d122018f20b031
Introduced
601a012837ea0a5c8095bf24223132824177124d
Fixed
0aa261a7765c9698aabc7f7c5be878a8850a9c5f
Introduced
9e6f6742c4d9e9915ee8af0dcb7d97cf1f836116
Fixed
002fa5032baa0f6a8c4587c81f60e3273775a4d1
Fixed
8fc71ac6af4fbcc54103bec2983ef22e82942688
Fixed
9dfa0c51eac97866078e808dec2183cb7871ff7c
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "17.0"
        },
        {
            "fixed": "26.2.5.19"
        },
        {
            "introduced": "27.0"
        },
        {
            "fixed": "27.3.4.10"
        },
        {
            "introduced": "28.0"
        },
        {
            "fixed": "28.4.2"
        }
    ]
}

Affected versions

OTP-17.*
OTP-17.0
OTP-18.*
OTP-18.0
OTP-18.0-rc1
OTP-19.*
OTP-19.0
OTP-19.0-rc1
OTP-19.0-rc2
OTP-20.*
OTP-20.0
OTP-20.0-rc1
OTP-20.0-rc2
OTP-21.*
OTP-21.0
OTP-21.0-rc1
OTP-21.0-rc2
OTP-22.*
OTP-22.0
OTP-22.0-rc1
OTP-22.0-rc2
OTP-22.0-rc3
OTP-23.*
OTP-23.0
OTP-23.0-rc1
OTP-23.0-rc2
OTP-23.0-rc3
OTP-24.*
OTP-24.0
OTP-24.0-rc1
OTP-24.0-rc2
OTP-24.0-rc3
OTP-25.*
OTP-25.0
OTP-25.0-rc1
OTP-25.0-rc2
OTP-25.0-rc3
OTP-26.*
OTP-26.0
OTP-26.0-rc1
OTP-26.0-rc2
OTP-26.0-rc3
OTP-26.1
OTP-26.2
OTP-26.2.3
OTP-26.2.4
OTP-26.2.5
OTP-26.2.5.1
OTP-26.2.5.10
OTP-26.2.5.11
OTP-26.2.5.12
OTP-26.2.5.13
OTP-26.2.5.14
OTP-26.2.5.15
OTP-26.2.5.16
OTP-26.2.5.17
OTP-26.2.5.18
OTP-26.2.5.2
OTP-26.2.5.3
OTP-26.2.5.4
OTP-26.2.5.5
OTP-26.2.5.6
OTP-26.2.5.7
OTP-26.2.5.8
OTP-26.2.5.9
OTP-27.*
OTP-27.0
OTP-27.1
OTP-27.2
OTP-27.3
OTP-27.3.1
OTP-27.3.2
OTP-27.3.3
OTP-27.3.4
OTP-27.3.4.1
OTP-27.3.4.2
OTP-27.3.4.3
OTP-27.3.4.4
OTP-27.3.4.5
OTP-27.3.4.6
OTP-27.3.4.7
OTP-27.3.4.8
OTP-27.3.4.9
OTP-28.*
OTP-28.0
OTP-28.1
OTP-28.4
OTP-28.4.1
Other
patch-base-26
patch-base-27

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28808.json"