What is CVE-2026-90970?
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.
The record classifies CVE-2026-90970 under weakness class CWE-1336. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 23 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.9 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS (FIRST)
- 0.9% probability of exploitation in the next 30 days, higher than 59.8% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 9.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-10-02
Is CVE-2026-90970 being exploited?
Weaponised exploit code for CVE-2026-90970 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 56 in the Threadlinqs vulnerability feed.
Affected products and versions
- GitLab: AI Gateway
How to fix CVE-2026-90970
No vendor patch reference has been recorded for CVE-2026-90970 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-90970
1 tracked threat in the Threadlinqs corpus references CVE-2026-90970, either in the campaign’s CVE list or as an indicator on the campaign record.
- GitLab AI Gateway critical RCE via prompt template sandbox escape (CVE-2026-90970) — CRITICAL · 2026-10-02
Sources
Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .