CVE-2026-10086

Name: CVE-2026-10086
Creator: NVD / NIST
Published: 2026-06-25T05:16:50.53+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.27%

Last modified Jun 26, 2026

CVE-2026-10086 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.27%

19.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 16.4.0, < 18.11.6
Gitlab	Gitlab	>= 19.0.0, < 19.0.3
Gitlab	Gitlab	19.1.0

References

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/Patch, Release Notes, Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/work_items/601634Broken Link
https://hackerone.com/reports/3734800Permissions Required

Timeline

Published: Jun 25, 2026
Last Modified: Jun 26, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-10086?

How severe is CVE-2026-10086?

CVE-2026-10086 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-10086?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-10086?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST