CVE-2026-40892

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer overflow exists in pjsipauthcreatedigest2() in PJSIP when using pre-computed digest credentials (PJSIPCREDDATADIGEST). The function copies credential data using cred_info->data.slen as the length without an upper-bound check, which can overflow the fixed-size ha1 stack buffer (128 bytes) if data.slen exceeds the expected digest string length.

Database specific

{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40892.json",
    "cwe_ids": [
        "CWE-121"
    ]
}

References

Affected packages

Git / github.com/pjsip/pjproject

Affected ranges

Type

GIT

Repo

https://github.com/pjsip/pjproject

Events

Introduced

Fixed

5a457451fa2712ba18e12b01738e8ff3af2b26fd

Fixed

c82123ea6f3c3652bbc9ebd5e9e658c301451687

Database specific

{
    "cpe": "cpe:2.3:a:pjsip:pjsip:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.17"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

2.*

2.10

2.11

2.12

2.13

2.14

2.15

2.16

Database specific

vanir_signatures_modified

"2026-07-15T22:54:09Z"

vanir_signatures

[
    {
        "target": {
            "file": "pjsip/src/pjsip/sip_auth_client.c"
        },
        "id": "CVE-2026-40892-90d1ec2f",
        "digest": {
            "line_hashes": [
                "271487805372020685281929672924788739023",
                "143341940733911665328653855004538887896",
                "39470024426347641986137587022818173795",
                "143753489192855065967366424481963127456"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687"
    },
    {
        "target": {
            "function": "pjsip_auth_create_digest2",
            "file": "pjsip/src/pjsip/sip_auth_client.c"
        },
        "id": "CVE-2026-40892-c123ba4b",
        "digest": {
            "function_hash": "94974654019773955036750536571538866115",
            "length": 6507.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687"
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40892.json"