How severe is CVE-2026-34235?

CVE-2026-34235 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-34235 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34235?

CVE-2026-34235 affects Teluu Pjsip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34235?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-34235 have an EU (EUVD) identifier?

Yes. CVE-2026-34235 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17494.

When was CVE-2026-34235 published?

CVE-2026-34235 was published on 2026-03-31 and last updated on 2026-06-17.

CVE-2026-34235

CVE-2026-34235 is a critical-severity vulnerability in Teluu Pjsip with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 6.9
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17494
Weakness: CWE-125
Affected product: Teluu Pjsip
Published: 2026-03-31
Last modified: 2026-06-17

Description

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap out-of-bounds read vulnerability exists in PJSIP's VP9 RTP unpacketizer that occurs when parsing crafted VP9 Scalability Structure (SS) data. Insufficient bounds checking on the payload descriptor length may cause reads beyond the allocated RTP payload buffer. This issue has been patched in version 2.17. A workaround for this issue involves disabling VP9 codec if not needed.

Frequently asked questions

What is CVE-2026-34235?: PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap out-of-bounds read vulnerability exists in PJSIP's VP9 RTP unpacketizer that occurs when parsing crafted VP9 Scalability Structure (SS) data. Insufficient bounds checking on the payload descriptor length may cause reads beyond the allocated RTP payload buffer. This issue has been patched in version 2.17. A workaround for this issue involves disabling VP9 codec if not needed.
How severe is CVE-2026-34235?: CVE-2026-34235 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-34235 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34235?: CVE-2026-34235 affects Teluu Pjsip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34235?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-34235 have an EU (EUVD) identifier?: Yes. CVE-2026-34235 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17494.
When was CVE-2026-34235 published?: CVE-2026-34235 was published on 2026-03-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*

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