CVE-2026-84975

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Source

https://cve.org/CVERecord?id=CVE-2026-84975

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84975.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-84975

Aliases

GHSA-382p-87mh-r3q8

Downstream

DEBIAN-CVE-2026-84975

Published

2026-09-18T17:08:33Z

Modified

2026-09-19T03:47:23Z

Severity

7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator

Summary

PJSIP: TLS server identity (hostname) verification bypass via embedded NUL in certificate SubjectAltName (OpenSSL and GnuTLS backends)

Details

PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the OpenSSL and GnuTLS backends in pjlib/src/pj/ssl_sock_ossl.c and pjlib/src/pj/ssl_sock_gtls.c copy DNS SubjectAltName values with string functions that recalculate their length and truncate an embedded NUL byte. With server verification enabled through --tls-verify-server for the PJSIP TLS/SIPS transport, a certificate containing a DNS SubjectAltName formed from the target hostname prefix followed by an embedded NUL and an attacker-controlled suffix can therefore be accepted for the prefix hostname. An attacker who possesses such a certificate from a trusted issuer and can intercept the connection can impersonate the target server, complete the SIP session, and receive REGISTER credentials. The mbedTLS backend is not affected because it preserves the explicit string length. No fixed version is available as of this review.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-295",
        "CWE-297"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84975.json"
}

References

Affected packages

Git / github.com/pjsip/pjproject

Affected ranges

Type

GIT

Repo

https://github.com/pjsip/pjproject

Events

Introduced

Last Affected

5a457451fa2712ba18e12b01738e8ff3af2b26fd

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.17"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

2.*

2.10

2.11

2.12

2.13

2.14

2.15

2.16

2.17

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84975.json"