CVE-2026-5402

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.39% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 32.8% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-26.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-30 05:39Z6 MO AGO

Last updated

2026-07-15 00:43Z3 MO AGO

Reserved

2026-04-02

Assigning CNA

GitLab

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant

Data version

5.2

Document digest

57f8fe78bfaec66990b7e0b7956e72fe3c2ae41e5fc784f2ea95b7eb26df0650

• www.wireshark.orghttps://www.wireshark.org/security/wnpa-sec-2026-14.html
• gitlab.comGitLab Issue #21090https://gitlab.com/wireshark/wireshark/-/issues/21090issue-trackingpermissions-required
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-5402vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2464038https://bugzilla.redhat.com/show_bug.cgi?id=2464038issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5402.jsonx_sadp-csaf-vex