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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-26203

PJSIP is a free and open source multimedia communication library. Versions prior to 2.17 have a critical heap buffer underflow vulnerability in PJSIP's H.264 packetizer. The bug occurs when processing malformed H.264 bitstreams without NAL unit start codes, where the packetizer performs unchecked pointer arithmetic that can read from memory located before the allocated buffer. Version 2.17 contains a patch for the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.6%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-26203
  • Pjsip » Pjsip » Version: N/A
    cpe:2.3:a:pjsip:pjsip:-
  • Pjsip » Pjsip » Version: 0.5.0.1
    cpe:2.3:a:pjsip:pjsip:0.5.0.1
  • Pjsip » Pjsip » Version: 0.5.10
    cpe:2.3:a:pjsip:pjsip:0.5.10
  • Pjsip » Pjsip » Version: 0.5.10.1
    cpe:2.3:a:pjsip:pjsip:0.5.10.1
  • Pjsip » Pjsip » Version: 0.5.10.2
    cpe:2.3:a:pjsip:pjsip:0.5.10.2
  • Pjsip » Pjsip » Version: 0.5.10.3
    cpe:2.3:a:pjsip:pjsip:0.5.10.3
  • Pjsip » Pjsip » Version: 0.5.10.4
    cpe:2.3:a:pjsip:pjsip:0.5.10.4
  • Pjsip » Pjsip » Version: 0.5.2
    cpe:2.3:a:pjsip:pjsip:0.5.2
  • Pjsip » Pjsip » Version: 0.5.3
    cpe:2.3:a:pjsip:pjsip:0.5.3
  • Pjsip » Pjsip » Version: 0.5.4
    cpe:2.3:a:pjsip:pjsip:0.5.4
  • Pjsip » Pjsip » Version: 0.5.5.1
    cpe:2.3:a:pjsip:pjsip:0.5.5.1
  • Pjsip » Pjsip » Version: 0.5.6
    cpe:2.3:a:pjsip:pjsip:0.5.6
  • Pjsip » Pjsip » Version: 0.5.6.1
    cpe:2.3:a:pjsip:pjsip:0.5.6.1
  • Pjsip » Pjsip » Version: 0.5.7
    cpe:2.3:a:pjsip:pjsip:0.5.7
  • Pjsip » Pjsip » Version: 0.5.8
    cpe:2.3:a:pjsip:pjsip:0.5.8
  • Pjsip » Pjsip » Version: 0.5.9
    cpe:2.3:a:pjsip:pjsip:0.5.9
  • Pjsip » Pjsip » Version: 0.7.0
    cpe:2.3:a:pjsip:pjsip:0.7.0
  • Pjsip » Pjsip » Version: 0.8.0
    cpe:2.3:a:pjsip:pjsip:0.8.0
  • Pjsip » Pjsip » Version: 0.9.0
    cpe:2.3:a:pjsip:pjsip:0.9.0
  • Pjsip » Pjsip » Version: 1.0
    cpe:2.3:a:pjsip:pjsip:1.0
  • Pjsip » Pjsip » Version: 1.0.1
    cpe:2.3:a:pjsip:pjsip:1.0.1
  • Pjsip » Pjsip » Version: 1.0.2
    cpe:2.3:a:pjsip:pjsip:1.0.2
  • Pjsip » Pjsip » Version: 1.0.3
    cpe:2.3:a:pjsip:pjsip:1.0.3
  • Pjsip » Pjsip » Version: 1.1
    cpe:2.3:a:pjsip:pjsip:1.1
  • Pjsip » Pjsip » Version: 1.10
    cpe:2.3:a:pjsip:pjsip:1.10
  • Pjsip » Pjsip » Version: 1.12
    cpe:2.3:a:pjsip:pjsip:1.12
  • Pjsip » Pjsip » Version: 1.14
    cpe:2.3:a:pjsip:pjsip:1.14
  • Pjsip » Pjsip » Version: 1.14.2
    cpe:2.3:a:pjsip:pjsip:1.14.2
  • Pjsip » Pjsip » Version: 1.16
    cpe:2.3:a:pjsip:pjsip:1.16
  • Pjsip » Pjsip » Version: 1.2
    cpe:2.3:a:pjsip:pjsip:1.2
  • Pjsip » Pjsip » Version: 1.3
    cpe:2.3:a:pjsip:pjsip:1.3
  • Pjsip » Pjsip » Version: 1.4
    cpe:2.3:a:pjsip:pjsip:1.4
  • Pjsip » Pjsip » Version: 1.4.5
    cpe:2.3:a:pjsip:pjsip:1.4.5
  • Pjsip » Pjsip » Version: 1.5
    cpe:2.3:a:pjsip:pjsip:1.5
  • Pjsip » Pjsip » Version: 1.5.5
    cpe:2.3:a:pjsip:pjsip:1.5.5
  • Pjsip » Pjsip » Version: 1.6
    cpe:2.3:a:pjsip:pjsip:1.6
  • Pjsip » Pjsip » Version: 1.7
    cpe:2.3:a:pjsip:pjsip:1.7
  • Pjsip » Pjsip » Version: 1.8
    cpe:2.3:a:pjsip:pjsip:1.8
  • Pjsip » Pjsip » Version: 1.8.10
    cpe:2.3:a:pjsip:pjsip:1.8.10
  • Pjsip » Pjsip » Version: 1.8.5
    cpe:2.3:a:pjsip:pjsip:1.8.5
  • Pjsip » Pjsip » Version: 2.0
    cpe:2.3:a:pjsip:pjsip:2.0
  • Pjsip » Pjsip » Version: 2.0.1
    cpe:2.3:a:pjsip:pjsip:2.0.1
  • Pjsip » Pjsip » Version: 2.1
    cpe:2.3:a:pjsip:pjsip:2.1
  • Pjsip » Pjsip » Version: 2.10
    cpe:2.3:a:pjsip:pjsip:2.10
  • Pjsip » Pjsip » Version: 2.11
    cpe:2.3:a:pjsip:pjsip:2.11
  • Pjsip » Pjsip » Version: 2.11.1
    cpe:2.3:a:pjsip:pjsip:2.11.1
  • Pjsip » Pjsip » Version: 2.12
    cpe:2.3:a:pjsip:pjsip:2.12
  • Pjsip » Pjsip » Version: 2.13
    cpe:2.3:a:pjsip:pjsip:2.13
  • Pjsip » Pjsip » Version: 2.13.1
    cpe:2.3:a:pjsip:pjsip:2.13.1
  • Pjsip » Pjsip » Version: 2.14
    cpe:2.3:a:pjsip:pjsip:2.14
  • Pjsip » Pjsip » Version: 2.14.1
    cpe:2.3:a:pjsip:pjsip:2.14.1
  • Pjsip » Pjsip » Version: 2.15
    cpe:2.3:a:pjsip:pjsip:2.15
  • Pjsip » Pjsip » Version: 2.15.1
    cpe:2.3:a:pjsip:pjsip:2.15.1
  • Pjsip » Pjsip » Version: 2.16
    cpe:2.3:a:pjsip:pjsip:2.16
  • Pjsip » Pjsip » Version: 2.2
    cpe:2.3:a:pjsip:pjsip:2.2
  • Pjsip » Pjsip » Version: 2.2.1
    cpe:2.3:a:pjsip:pjsip:2.2.1
  • Pjsip » Pjsip » Version: 2.3
    cpe:2.3:a:pjsip:pjsip:2.3
  • Pjsip » Pjsip » Version: 2.4
    cpe:2.3:a:pjsip:pjsip:2.4
  • Pjsip » Pjsip » Version: 2.4.5
    cpe:2.3:a:pjsip:pjsip:2.4.5
  • Pjsip » Pjsip » Version: 2.5
    cpe:2.3:a:pjsip:pjsip:2.5
  • Pjsip » Pjsip » Version: 2.5.1
    cpe:2.3:a:pjsip:pjsip:2.5.1
  • Pjsip » Pjsip » Version: 2.5.5
    cpe:2.3:a:pjsip:pjsip:2.5.5
  • Pjsip » Pjsip » Version: 2.6
    cpe:2.3:a:pjsip:pjsip:2.6
  • Pjsip » Pjsip » Version: 2.7
    cpe:2.3:a:pjsip:pjsip:2.7
  • Pjsip » Pjsip » Version: 2.7.1
    cpe:2.3:a:pjsip:pjsip:2.7.1
  • Pjsip » Pjsip » Version: 2.7.2
    cpe:2.3:a:pjsip:pjsip:2.7.2
  • Pjsip » Pjsip » Version: 2.8
    cpe:2.3:a:pjsip:pjsip:2.8
  • Pjsip » Pjsip » Version: 2.9
    cpe:2.3:a:pjsip:pjsip:2.9


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