CVE-2026-10086
Auth developer can run arbitrary client-side code in another session.
Is CVE-2026-10086 being exploited?
Not confirmed. CVE-2026-10086 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-10086?
CVE-2026-10086 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-10086?
Yes. A fix has been recorded for CVE-2026-10086. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-10086 affect?
CVE-2026-10086 affects GitLab Enterprise Edition (EE) versions: 16.4.x before 18.11.6; 19.0.x before 19.0.3; 19.1.x before 19.1.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-10086?
Upgrade to fixed releases (18.11.6+, 19.0.3+, 19.1.1+)
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated developer can execute arbitrary client-side code in another user's session; potential data exposure and session hijack.
Immediate action required
- affected>= 16.4 and < 18.11.6
- affected>= 19.0 and < 19.0.3
- affected>= 19.1 and < 19.1.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.