CVE-2026-70480

MEDIUMPre-NVD 4.14.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 91% 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
Elevated
4.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.1Exploit: Elevated riskExposed: 0

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

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.34 until 0.11.0, Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer browser without a restricted resource loader. Any user who can place such a block where another user will see it can make that user browser issue attacker-chosen outbound GET requests and read responses from same-origin or CORS-permissive targets into the rendered page. This issue is fixed in 0.11.0.

CVSS v3
4.1
EG Score
4.1(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity41% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 4, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Aug 4, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v0.11.0

Patch available: open-webui/open-webui v0.11.0

https://github.com/open-webui/open-webui/releases/tag/v0.11.0
github_commit

commit 5278eb906ebe (open-webui/open-webui)

Fix landed in open-webui/open-webui commit 5278eb906ebe — awaiting tagged release

https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6
github_pr

fix: block external resource loading in Vega chart rendering to prevent client-side SSRF

Fix merged in open-webui/open-webui PR #26806 on 2026-07-27 — awaiting tagged release

https://github.com/open-webui/open-webui/pull/26806
github Patch Available🟡 PoC Available

Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering · Advisory · open-webui/open-webui · GitHub

https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649

Vendor Advisories for CVE-2026-70480(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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
open-webui0.10.0 ... 0.9.6 (36 versions)0.11.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 46× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 15:04 UTCEG score recompute
  3. 2026-09-17 16:12 UTCEG score recompute
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 11:14 UTCEG score recompute
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 06:54 UTCEG score recompute
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-14 05:19 UTCEG score recompute
  10. 2026-09-13 04:40 UTCEG score recompute
  11. 2026-09-12 15:02 UTCEPSS rescore
  12. 2026-09-12 03:58 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 03:15 UTCEG score recompute
  15. 2026-09-10 09:35 UTCEPSS rescore
  16. 2026-09-10 02:36 UTCEG score recompute
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 18:30 UTCEG score recompute
  19. 2026-09-07 16:01 UTCEPSS rescore
  20. 2026-09-06 13:47 UTCEPSS rescore
  21. 2026-09-06 11:59 UTCEG score recompute
  22. 2026-09-05 15:31 UTCEPSS rescore
  23. 2026-09-05 11:20 UTCEG score recompute
  24. 2026-09-04 10:07 UTCEG score recompute
  25. 2026-09-04 05:07 UTCEPSS rescore
Show 52 more
  1. 2026-09-03 07:27 UTCEG score recompute
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 23:45 UTCEG score recompute
  4. 2026-09-01 13:54 UTCEPSS rescore
  5. 2026-09-01 04:40 UTCEPSS rescore
  6. 2026-08-30 22:25 UTCEG score recompute
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 01:22 UTCEPSS rescore
  9. 2026-08-29 21:45 UTCEG score recompute
  10. 2026-08-28 21:42 UTCEPSS rescore
  11. 2026-08-27 08:15 UTCEG score recompute
  12. 2026-08-26 14:47 UTCEPSS rescore
  13. 2026-08-26 05:24 UTCEG score recompute
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-25 04:26 UTCEG score recompute
  16. 2026-08-23 03:04 UTCEG score recompute
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 02:22 UTCEG score recompute
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 01:29 UTCEG score recompute
  21. 2026-08-20 22:56 UTCEPSS rescore
  22. 2026-08-20 00:49 UTCEG score recompute
  23. 2026-08-19 17:04 UTCEPSS rescore
  24. 2026-08-19 00:06 UTCEG score recompute
  25. 2026-08-18 13:49 UTCEPSS rescore
  26. 2026-08-18 13:49 UTCEPSS rescore
  27. 2026-08-16 22:44 UTCEG score recompute
  28. 2026-08-16 14:56 UTCEPSS rescore
  29. 2026-08-16 14:56 UTCEPSS rescore
  30. 2026-08-16 02:15 UTCEPSS rescore
  31. 2026-08-15 22:05 UTCEG score recompute
  32. 2026-08-15 01:31 UTCEPSS rescore
  33. 2026-08-14 21:25 UTCEG score recompute
  34. 2026-08-13 22:00 UTCEPSS rescore
  35. 2026-08-12 20:05 UTCEG score recompute
  36. 2026-08-12 13:51 UTCEPSS rescore
  37. 2026-08-11 19:26 UTCEG score recompute
  38. 2026-08-11 00:00 UTCEPSS rescore
  39. 2026-08-09 18:07 UTCEG score recompute
  40. 2026-08-09 13:47 UTCEPSS rescore
  41. 2026-08-08 17:28 UTCEG score recompute
  42. 2026-08-08 16:37 UTCEPSS rescore
  43. 2026-08-07 16:48 UTCEG score recompute
  44. 2026-08-06 16:09 UTCEG score recompute
  45. 2026-08-06 13:47 UTCEPSS rescore
  46. 2026-08-05 19:17 UTCEPSS rescore
  47. 2026-08-05 19:17 UTCEPSS rescore
  48. 2026-08-05 15:29 UTCEG score recompute
  49. 2026-08-05 14:38 UTCEG score recompute
  50. 2026-08-04 20:32 UTCEG score recompute
  51. 2026-08-04 20:06 UTCEG score recompute
  52. 2026-08-04 20:06 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-70480?
CVE-2026-70480 is a medium vulnerability published on August 4, 2026. Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.34 until 0.11.0, Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer browser without a restricted resource loader. Any user who can place such a…
When was CVE-2026-70480 disclosed?
CVE-2026-70480 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70480 actively exploited?
CVE-2026-70480 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.8% of all scored CVEs.
What is the CVSS score of CVE-2026-70480?
CVE-2026-70480 has a CVSS v3 base score of 4.1 (NVD).
How do I remediate CVE-2026-70480?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70480, 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-2026-70480

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