CVE-2026-52721
CVE-2026-52721 is a medium-severity vulnerability 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-125.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- EPSS exploit prediction: 0% (1st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-36800
- Weakness: CWE-125
- Published:
- Last modified:
Description
Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element. Malformed PCAP records can trigger reads beyond buffer boundaries during IPv4/TCP header parsing. This element is primarily used in debugging pipelines, limiting real-world exposure. A local attacker could trick a user into processing a specially crafted PCAP file, potentially leading to a crash or information disclosure.
Frequently asked questions
- What is CVE-2026-52721?
- Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element. Malformed PCAP records can trigger reads beyond buffer boundaries during IPv4/TCP header parsing. This element is primarily used in debugging pipelines, limiting real-world exposure. A local attacker could trick a user into processing a specially crafted PCAP file, potentially leading to a crash or information disclosure.
- How severe is CVE-2026-52721?
- CVE-2026-52721 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability high.
- Is CVE-2026-52721 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-52721?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-52721 have an EU (EUVD) identifier?
- Yes. CVE-2026-52721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36800.
- When was CVE-2026-52721 published?
- CVE-2026-52721 was published on 2026-06-15 and last updated on 2026-06-17.
References
- https://access.redhat.com/security/cve/CVE-2026-52721
- https://bugzilla.redhat.com/show_bug.cgi?id=2486732
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5106
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