CVE-2026-34235Network attack vector

Service interruption via VP9 SS descriptor overread

Published Mar 31, 2026 · Updated Mar 31, 2026

Out-of-bounds read in Teluu PJPROJECT before 2.17 allows remote attackers to interrupt video applications via crafted VP9 RTP media. In pjmedia/src/pjmedia-codec/vpx_packetizer.c, the VP9 Scalability Structure parser adds N_S * 4 to desc_len without checking the result against payload_len. The path requires PJMEDIA_HAS_VIDEO and receipt of VP9 RTP media; the vendor assessment reports service interruption without data disclosure or modification.

CVSS severity6.9
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Teluu PJPROJECT before 2.17 allows remote attackers to interrupt video applications via crafted VP9 RTP media. In pjmedia/src/pjmedia-codec/vpx_packetizer.c, the VP9 Scalability Structure parser adds N_S * 4 to desc_len without checking the result against payload_len. The path requires PJMEDIA_HAS_VIDEO and receipt of VP9 RTP media; the vendor assessment reports service interruption without data disclosure or modification.

The record

CVE
CVE-2026-34235
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
PJSIP
Product
PJPROJECT
Classifications
CWE-125, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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=< 2.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PJSIP · PJPROJECTversion=< 2.17

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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