CVE-2026-54789

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Source
https://cve.org/CVERecord?id=CVE-2026-54789
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-54789.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-54789
Aliases
  • GHSA-vgr5-qcpp-x2pr
Downstream
Related
Published
2026-08-21T16:13:23Z
Modified
2026-09-04T08:11:34Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
mod_auth_openidc has out-of-bounds read and write in state cookie parsing
Details

mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.19.4, an out-of-bounds read and a one-byte out-of-bounds write exist in the state-cookie parser of mod_auth_openidc. The issue is fixed in version 2.4.19.4 by stopping the scan at the string terminator so a value-less token is rejected. No in-product workarounds are available. As a stop-gap, an upstream reverse proxy or WAF that rejects or normalizes malformed Cookie headers (tokens lacking =) can reduce exposure, but upgrading is the recommended remediation.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54789.json"
}
References

Affected packages

Git / github.com/openidc/mod_auth_openidc

Affected ranges

Type
GIT
Repo
https://github.com/openidc/mod_auth_openidc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8017478471cc071c49aa073c5c9be652a73a8630
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.4.19.4"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

2.*
2.3.11rc1
v1.*
v1.5
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5
v1.6.0
v1.7.0
v1.8.0
v1.8.1
v1.8.10
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.8.6
v1.8.7
v1.8.8
v1.8.9
v2.*
v2.0.0
v2.0.0rc1
v2.0.0rc4
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.1.5
v2.1.6
v2.2.0
v2.3.0
v2.3.0rc0
v2.3.0rc3
v2.3.1
v2.3.10
v2.3.10.1
v2.3.10.2
v2.3.11
v2.3.2
v2.3.3
v2.3.4
v2.3.5
v2.3.6
v2.3.7
v2.3.8
v2.3.9
v2.4.0
v2.4.0.1
v2.4.0.2
v2.4.0.3
v2.4.0.4
v2.4.1
v2.4.10
v2.4.11
v2.4.11.1
v2.4.11.2
v2.4.11.3
v2.4.12
v2.4.12.1
v2.4.12.2
v2.4.12.3
v2.4.13
v2.4.13.1
v2.4.13.2
v2.4.14
v2.4.14.1
v2.4.14.2
v2.4.14.3
v2.4.14.4
v2.4.15
v2.4.15.1
v2.4.15.2
v2.4.15.3
v2.4.15.4
v2.4.15.5
v2.4.15.6
v2.4.15.7
v2.4.16
v2.4.16.1
v2.4.16.10
v2.4.16.11
v2.4.16.2
v2.4.16.3
v2.4.16.4
v2.4.16.5
v2.4.16.6
v2.4.16.7
v2.4.16.8
v2.4.16.9
v2.4.17
v2.4.17.1
v2.4.17.2
v2.4.18
v2.4.18.1
v2.4.19
v2.4.19.1
v2.4.19.2
v2.4.19.3
v2.4.2
v2.4.2.1
v2.4.3
v2.4.4
v2.4.4.1
v2.4.5
v2.4.6
v2.4.7
v2.4.7.1
v2.4.7.2
v2.4.8.1
v2.4.8.2
v2.4.8.3
v2.4.8.4
v2.4.9
v2.4.9.1
v2.4.9.2
v2.4.9.3
v2.4.9.4

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-54789.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "70831870423161090910387495769096353594",
                "251522285052450793301443864755380277658",
                "177705975256860084344856102528052936787",
                "192503434168308454777900497137426301263"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-54789-1f3b0ed8",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/8017478471cc071c49aa073c5c9be652a73a8630",
        "target": {
            "file": "src/state.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "247466007496986471113165742689547077063",
            "length": 804
        },
        "id": "CVE-2026-54789-2b6dcadf",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/8017478471cc071c49aa073c5c9be652a73a8630",
        "target": {
            "file": "test/test_state.c",
            "function": "main"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "193350400988702263902964781649491558353",
            "length": 488
        },
        "id": "CVE-2026-54789-4c62c5e8",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/8017478471cc071c49aa073c5c9be652a73a8630",
        "target": {
            "file": "src/state.c",
            "function": "oidc_state_cookies_parse_token"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "299701336619880153036665172526259069740",
                "151211151037283842020539100396100715108",
                "103069616787231984670234510666743102783",
                "218993426657821527075613173926275777958",
                "81589264247536892897081541643899056410",
                "8709090653557006556792553250146048417",
                "196568422358303593685490610712684316383"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-54789-65f39b3b",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/8017478471cc071c49aa073c5c9be652a73a8630",
        "target": {
            "file": "test/test_state.c"
        }
    }
]
vanir_signatures_modified 
"2026-09-04T08:11:34Z"