How severe is CVE-2026-26967?

CVE-2026-26967 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-26967 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26967?

CVE-2026-26967 affects Pjsip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26967?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26967 have an EU (EUVD) identifier?

Yes. CVE-2026-26967 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8404.

When was CVE-2026-26967 published?

CVE-2026-26967 was published on 2026-02-20 and last updated on 2026-06-17.

CVE-2026-26967

CVE-2026-26967 is a medium-severity vulnerability in Pjsip with a CVSS 3.x base score of 5.3. 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-122.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 8.1
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8404
Weakness: CWE-122
Affected product: Pjsip
Published: 2026-02-20
Last modified: 2026-06-17

Description

PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.

Frequently asked questions

What is CVE-2026-26967?: PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.
How severe is CVE-2026-26967?: CVE-2026-26967 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-26967 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26967?: CVE-2026-26967 affects Pjsip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26967?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26967 have an EU (EUVD) identifier?: Yes. CVE-2026-26967 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8404.
When was CVE-2026-26967 published?: CVE-2026-26967 was published on 2026-02-20 and last updated on 2026-06-17.

References

Affected products (1)

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

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