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Fencer Intel
critical 9.9

CVE-2026-90970 in the critical feed json

Improper Neutralization of Special Elements Used in a Template Engine in GitLab AI Gateway

published last mo. modified last mo. also EUVD-2026-91651

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
17.5%
EPSS 17.5% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

GitLab has remediated a vulnerability in the GitLab AI Gateway component affecting all versions of the AI Gateway from 18.1.6 before 19.2.4, 19.3 before 19.3.2, and 19.4 before 19.4.1 that, under certain conditions, could have allowed an authenticated user with Duo Agent Platform access to escape the prompt template sandbox via a specially crafted flow configuration, resulting in arbitrary command execution on the AI Gateway.

Patch / fix

  • GitLab GitLab AI Gateway 19.2.4, 19.3.2, 19.4.1

Is CVE-2026-90970 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

17.49% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

  • GitLab GitLab AI Gateway

Classification

Weakness
  • CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.