CVE-2026-28737

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 74% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.7
EG Score
8.7(medium)
EPSS
25.6%
KEV
Not listed

Published

June 17, 2026

Last Modified

July 6, 2026

Advisory Details (4)

Auto-updated Jul 3, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release, github.
github Patch Available🟡 PoC Available

Stored XSS via glTF `extensionsRequired` in Gitea 3D File Viewer · Advisory · go-gitea/gitea · GitHub

https://github.com/go-gitea/gitea/security/advisories/GHSA-9cpj-qc93-vw8v
github_release Patch Available

v1.26.0

Patch available: go-gitea/gitea v1.26.0

https://github.com/go-gitea/gitea/releases/tag/v1.26.0
github_pr

Frontend iframe renderer framework: 3D models, OpenAPI

Fix merged in go-gitea/gitea PR #37233 on 2026-04-17 — awaiting tagged release

https://github.com/go-gitea/gitea/pull/37233
generic

Gitea 1.26.0 is released | Gitea Blog

https://blog.gitea.com/release-of-1.26.0/

Vendor Advisories for CVE-2026-28737(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
code.gitea.io/gitea—1.26.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 22:55 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 10:30 UTCEG score recompute
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 21:49 UTCEG score recompute
  8. 2026-07-05 09:23 UTCEG score recompute
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 20:57 UTCEG score recompute
  11. 2026-07-04 08:33 UTCEG score recompute
  12. 2026-07-03 20:04 UTCEG score recompute
  13. 2026-07-03 07:39 UTCEG score recompute
  14. 2026-07-02 19:15 UTCEG score recompute
  15. 2026-07-02 06:51 UTCEG score recompute
  16. 2026-07-01 18:27 UTCEG score recompute
  17. 2026-07-01 06:02 UTCEG score recompute
  18. 2026-06-30 17:36 UTCEG score recompute
  19. 2026-06-30 05:12 UTCEG score recompute
  20. 2026-06-29 16:45 UTCEG score recompute
  21. 2026-06-29 04:18 UTCEG score recompute
  22. 2026-06-28 15:54 UTCEG score recompute
  23. 2026-06-28 03:30 UTCEG score recompute
  24. 2026-06-27 15:05 UTCEG score recompute
  25. 2026-06-27 02:40 UTCEG score recompute
Show 18 more
  1. 2026-06-26 14:16 UTCEG score recompute
  2. 2026-06-26 01:51 UTCEG score recompute
  3. 2026-06-25 13:27 UTCEG score recompute
  4. 2026-06-25 01:03 UTCEG score recompute
  5. 2026-06-24 12:38 UTCEG score recompute
  6. 2026-06-24 00:13 UTCEG score recompute
  7. 2026-06-23 11:47 UTCEG score recompute
  8. 2026-06-22 23:20 UTCEG score recompute
  9. 2026-06-22 10:55 UTCEG score recompute
  10. 2026-06-21 22:28 UTCEG score recompute
  11. 2026-06-21 10:01 UTCEG score recompute
  12. 2026-06-20 21:37 UTCEG score recompute
  13. 2026-06-20 09:12 UTCEG score recompute
  14. 2026-06-19 20:33 UTCEG score recompute
  15. 2026-06-19 08:09 UTCEG score recompute
  16. 2026-06-18 19:36 UTCEG score recompute
  17. 2026-06-18 07:11 UTCEG score recompute
  18. 2026-06-17 18:46 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-28737?
CVE-2026-28737 is a high vulnerability published on June 17, 2026. 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.
When was CVE-2026-28737 disclosed?
CVE-2026-28737 was first published in the National Vulnerability Database on June 17, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28737 actively exploited?
CVE-2026-28737 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-28737?
CVE-2026-28737 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-28737?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28737, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-28737

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