CVE-2025-3891

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Source
https://cve.org/CVERecord?id=CVE-2025-3891
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-3891.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-3891
Aliases
Downstream
CGA (2)
CLSA (1)
DEBIAN (1)
MINI (1)
RHSA (9)
RLSA (2)
SUSE (4)
UBUNTU (1)
Related
ALSA (2)
SUSE (4)
Published
2025-04-29T11:56:50Z
Modified
2026-10-22T16:07:38Z
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: dos via empty post in mod_auth_openidc with oidcpreservepost enabled
Details

A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.

Database specific 
{
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-248"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3891.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "8100020250426100353.489197e6"
                        },
                        {
                            "fixed": "8020020250612174445.4cda2c84"
                        },
                        {
                            "fixed": "8040020250618101351.522a0ee4"
                        },
                        {
                            "fixed": "8060020250617090503.ad008a3a"
                        },
                        {
                            "fixed": "8060020250617090503.ad008a3a"
                        },
                        {
                            "fixed": "8060020250617090503.ad008a3a"
                        },
                        {
                            "fixed": "8080020250617090716.63b34585"
                        },
                        {
                            "fixed": "8080020250617090716.63b34585"
                        },
                        {
                            "fixed": "0:2.4.10-1.el9_6.2"
                        },
                        {
                            "fixed": "0:2.4.9.4-1.el9_0.3"
                        },
                        {
                            "fixed": "0:2.4.9.4-1.el9_2.3"
                        },
                        {
                            "fixed": "0:2.4.9.4-4.el9_4.2"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "InverseAffectedRanges"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/openidc/mod_auth_openidc

Affected ranges

Type
GIT
Repo
https://github.com/openidc/mod_auth_openidc
Events
Introduced
4fe40bd8bed0c7697f4fb2c3733d02d472cb849e
Fixed
5050a96dca441a921c95521bff6e47caa40c750b
Fixed
6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.4.13.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

2.*
2.3.11rc1
v2.*
v2.0.0
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
v2.4.2
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-2025-3891.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "211198591416651378099077896614660068044",
            "length": 663
        },
        "id": "CVE-2025-3891-0cdcbe7c",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b",
        "target": {
            "file": "src/mod_auth_openidc.c",
            "function": "oidc_original_request_method"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "239289886643070125605459760189440756043",
                "229876794043611023403253123313672969009",
                "263559125609405718920736118279668036461",
                "44104131586549595805645968922353939301"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-3891-4b8990d0",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b",
        "target": {
            "file": "src/mod_auth_openidc.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "64978875816620747788720445007160513623",
                "271594790058963848889881620267568419497",
                "192082871201767715712966956076527375237",
                "186523850938774963886596464906350199293"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-3891-8d12588a",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/5050a96dca441a921c95521bff6e47caa40c750b",
        "target": {
            "file": "src/jose.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "146796389184166318347761834619920743023",
            "length": 407
        },
        "id": "CVE-2025-3891-cdcc88f6",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/openidc/mod_auth_openidc/commit/5050a96dca441a921c95521bff6e47caa40c750b",
        "target": {
            "file": "src/jose.c",
            "function": "oidc_jwk_list_copy"
        }
    }
]
vanir_signatures_modified 
"2026-10-22T16:07:38Z"