# CVE-2026-19478 — GitLab

> As of 2026-08-17, CVE-2026-19478 is a CRITICAL-severity vulnerability in GitLab, CVSS v3.1 9.4. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-19478, most recently “Critical GitLab GraphQL Flaw (CVE-2026-19478, CVSS 9.4) Could Let Unauthenticated Attackers Delete Public Projects”.

**Last updated:** 2026-08-17

## What is CVE-2026-19478?

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.11.11, 19.0 before 19.0.8, 19.1 before 19.1.6, and 19.2 before 19.2.4 that under certain conditions could allow an unauthenticated user to remotely modify or delete public projects and user data via a GraphQL directive.

The record classifies CVE-2026-19478 under weakness class [CWE-94](https://cwe.mitre.org/data/definitions/94.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 27 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.4 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-17

## Is CVE-2026-19478 being exploited?

No public exploitation evidence for CVE-2026-19478 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-08-17. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **GitLab**: GitLab

## How to fix CVE-2026-19478

No vendor patch reference has been recorded for CVE-2026-19478 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-2026-19478

1 tracked threat in the Threadlinqs corpus references CVE-2026-19478, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Critical GitLab GraphQL Flaw (CVE-2026-19478, CVSS 9.4) Could Let Unauthenticated Attackers Delete Public Projects](https://intel.threadlinqs.com/threat/TL-2026-2048) — CRITICAL · 2026-08-17

## Sources

Enriched from CVE.org. Last verified by Threadlinqs on 2026-08-18.

**Exploit and proof of concept**

- [hackerone.com — technical description](https://hackerone.com/reports/3926431)

**Other references**

- [gitlab.com](https://gitlab.com/gitlab-org/gitlab/-/work_items/611377)
- [docs.gitlab.com](https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-4-released/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-19478
Full detection coverage and IOCs for threats exploiting CVE-2026-19478 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp