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High 8.8Published Apr 30, 2026
CVE-2026-5402Heap-based Buffer Overflow in Wireshark
Updated under an hour ago ()
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It affects Wireshark Foundation Wireshark and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-122
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitLab
- NVD analysis
- Modified
- Record last updated
- Jul 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Wireshark Foundation Wireshark wireshark_foundation:wireshark (from the name) | from 4.6.0 before 4.6.5 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CISA ADP |
wireshark wireshark wireshark:wireshark | from 4.6.0 through 4.6.4 | NVD |
References
- https://www.wireshark.org/security/wnpa-sec-2026-14.htmlvendor-advisory
- https://gitlab.com/wireshark/wireshark/-/issues/21090issue-tracking, permissions-required, exploit
- https://access.redhat.com/security/cve/CVE-2026-5402
- https://bugzilla.redhat.com/show_bug.cgi?id=2464038
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5402.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.