CVE-2026-26967Network attack vector

Remote memory corruption via unchecked NAL size read

Published Feb 20, 2026 · Updated Feb 20, 2026

Heap-based buffer overflow in Teluu PJPROJECT 2.16 and earlier allows remote attackers to corrupt memory via malformed H.264 SRTP packets. In pjmedia_h264_unpacketize(), the H.264 unpacketizer reads a two-byte NAL unit size without first ensuring that two payload bytes remain. Only applications built with video support that receive H.264 media reach this path; successful exploitation can compromise or interrupt the process.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Teluu PJPROJECT 2.16 and earlier allows remote attackers to corrupt memory via malformed H.264 SRTP packets. In pjmedia_h264_unpacketize(), the H.264 unpacketizer reads a two-byte NAL unit size without first ensuring that two payload bytes remain. Only applications built with video support that receive H.264 media reach this path; successful exploitation can compromise or interrupt the process.

The record

CVE
CVE-2026-26967
Published
Feb 20, 2026
Updated
Feb 20, 2026
Vendor
PJSIP
Product
PJPROJECT
Classifications
CWE-122
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< f821c214e52b11bae11e4cd3c7f0864538fb5491

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PJSIP · PJPROJECTversion=< f821c214e52b11bae11e4cd3c7f0864538fb5491

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
8.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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