CVE-2026-28799

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap use-after-free vulnerability exists in PJSIP's event subscription framework (evsub.c) that is triggered during presence unsubscription (SUBSCRIBE with Expires=0). This issue has been patched in version 2.17.

Database specific

{
    "cwe_ids": [
        "CWE-416"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28799.json"
}

References

Affected packages

Git / github.com/pjsip/pjproject

Affected ranges

Type

GIT

Repo

https://github.com/pjsip/pjproject

Events

Introduced

Fixed

5a457451fa2712ba18e12b01738e8ff3af2b26fd

Fixed

e06ff6c64741cc1675fd3296615910f532f6b1a1

Database specific

Show details

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

Affected versions

2.*

2.10

2.11

2.12

2.13

2.14

2.15

2.16

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28799.json"

vanir_signatures

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            "length": 1079.0
        },
        "target": {
            "function": "set_state",
            "file": "pjsip/src/pjsip-simple/evsub.c"
        },
        "source": "https://github.com/pjsip/pjproject/commit/e06ff6c64741cc1675fd3296615910f532f6b1a1",
        "signature_version": "v1",
        "id": "CVE-2026-28799-159797fa",
        "deprecated": false
    },
    {
        "signature_type": "Line",
        "digest": {
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        "signature_version": "v1",
        "id": "CVE-2026-28799-49830bcd",
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        "signature_type": "Function",
        "digest": {
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        "signature_version": "v1",
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]

vanir_signatures_modified

"2026-08-12T15:32:13Z"