CVE-2026-6537

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited 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

0.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 7.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. 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 05:37Z4 MO AGO

Last updated

2026-04-30 12:49Z4 MO AGO

Reserved

2026-04-17

Assigning CNA

GitLab

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

• CWE-121Stack-based Buffer OverflowVariant
• CWE-617Reachable AssertionBase

Data version

5.2

Document digest

1a91f957bdf93efb0f9be7c8dc648638188a00877cd3514009899bfb1f2efc64

• www.wireshark.orghttps://www.wireshark.org/security/wnpa-sec-2026-24.html
• gitlab.comGitLab Issue #21125https://gitlab.com/wireshark/wireshark/-/issues/21125issue-trackingpermissions-required
• gitlab.comhttps://gitlab.com/wireshark/wireshark/-/work_items/21125exploit