CVE-2026-16255

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 11.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-22.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-10-21 23:35Z7 DAYS AGO

Last updated

2026-10-21 23:35Z7 DAYS AGO

Reserved

2026-07-20

Assigning CNA

GitLab

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

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

Weaknesses

• CWE-863Incorrect AuthorizationClass

Data version

5.2

Document digest

7d2ed3f230b388c9e332200917068cd6f04a9d6d0215bb2a26e903cec7b8cf88

• gitlab.comhttps://gitlab.com/gitlab-org/gitlab/-/work_items/606479
• hackerone.comHackerOne Bug Bounty Report #3809350https://hackerone.com/reports/3809350technical-descriptionexploitpermissions-required
• docs.gitlab.comhttps://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/