Widely used GitLab AI Gateway; enables DoS or remote code execution via templating; high disruption risk.
CVE-2026-1868
Insecure template expansion in GitLab AI Gateway enables DoS or code execution.
Is CVE-2026-1868 being exploited?
Not confirmed. CVE-2026-1868 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 0.52% probability of exploitation in the next 30 days.
How severe is CVE-2026-1868?
CVE-2026-1868 is rated Critical with a CVSS score of 9.9. 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-2026-1868?
Yes. A fix has been recorded for CVE-2026-1868. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-1868 affect?
CVE-2026-1868 affects GitLab AI Gateway. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-1868?
Upgrade to 18.8.1 or latest patch level.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
DoS or remote code execution on GitLab AI Gateway via crafted Duo Flow definitions.
Immediate action required
- affected>= 18.1.6 and < 18.6.2
- affected>= 18.7.0 and < 18.7.1
- affected>= 18.8.0 and < 18.8.1
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.