Answer in brief
CVE-2026-78252 records a High severity (CVSS 8.2) vulnerability in Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab. The current sources do not mark it as known exploited. The current feed maps GitLab/GitLab (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps GitLab/GitLab (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | Not reported | Not reported |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| GitLab/GitLabgeneric | >=15.3 <19.1.8 || >=19.2 <19.2.6 || >=19.3 <19.3.2 | 19.1.8, 19.2.6, 19.3.2 |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that, under certain conditions, an authenticated user could have induced a targeted user to perform unintended state-changing HTTP requests due to improper sanitization of user-controlled data in the Markdown JSON table renderer.
Quoted source text, attributed separately from HOL analysis.