CVE-2026-59221

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% 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
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: 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 0.9.6 before 0.10.0, _sanitize_proxy_path in backend/open_webui/routers/terminals.py decoded proxy paths only eight times, allowing a nine-times percent-encoded ../ traversal value to pass normalization checks and be decoded by the upstream terminal server. This issue is fixed in version 0.10.0.

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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
Severity77% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 10, 2026

Advisory Details (4)

Auto-updated Jul 9, 2026
Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available

open-webui terminal proxy path traversal guard bypass via 9x encoded traversal · Advisory · open-webui/open-webui · GitHub

https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w
github_release Patch Available

v0.10.0

Patch available: open-webui/open-webui v0.10.0

https://github.com/open-webui/open-webui/releases/tag/v0.10.0
github_pr

Fail closed when the proxy/redirect path decode cap is exceeded

Fix merged in open-webui/open-webui PR #26050 on 2026-06-16 — awaiting tagged release

https://github.com/open-webui/open-webui/pull/26050
github_commit

commit 05098d25a58d (open-webui/open-webui)

Fix landed in open-webui/open-webui commit 05098d25a58d — awaiting tagged release

https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c

Vendor Advisories for CVE-2026-59221(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-webui0.9.60.10.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 54× 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. 2026-08-30 06:45 UTCEG score recompute
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 21:45 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-27 01:01 UTCEG score recompute
  7. 2026-08-26 14:46 UTCEPSS rescore
  8. 2026-08-26 03:50 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 22:18 UTCEG score recompute
  11. 2026-08-24 09:36 UTCEG score recompute
  12. 2026-08-23 06:49 UTCEG score recompute
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-22 05:25 UTCEG score recompute
  15. 2026-08-21 23:49 UTCEPSS rescore
  16. 2026-08-21 03:59 UTCEG score recompute
  17. 2026-08-20 22:55 UTCEPSS rescore
  18. 2026-08-20 01:46 UTCEG score recompute
  19. 2026-08-19 17:04 UTCEPSS rescore
  20. 2026-08-18 20:42 UTCEG score recompute
  21. 2026-08-18 13:48 UTCEPSS rescore
  22. 2026-08-17 23:37 UTCEG score recompute
  23. 2026-08-17 13:47 UTCEPSS rescore
  24. 2026-08-16 22:13 UTCEG score recompute
  25. 2026-08-16 14:56 UTCEPSS rescore
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  1. 2026-08-16 09:30 UTCEG score recompute
  2. 2026-08-16 02:14 UTCEPSS rescore
  3. 2026-08-15 08:07 UTCEG score recompute
  4. 2026-08-15 01:30 UTCEPSS rescore
  5. 2026-08-14 06:42 UTCEG score recompute
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-12 16:26 UTCEG score recompute
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-11 15:01 UTCEG score recompute
  10. 2026-08-11 02:19 UTCEG score recompute
  11. 2026-08-11 00:00 UTCEPSS rescore
  12. 2026-08-10 00:54 UTCEG score recompute
  13. 2026-08-09 13:46 UTCEPSS rescore
  14. 2026-08-08 23:31 UTCEG score recompute
  15. 2026-08-08 16:37 UTCEPSS rescore
  16. 2026-08-07 22:06 UTCEG score recompute
  17. 2026-08-06 20:42 UTCEG score recompute
  18. 2026-08-06 13:47 UTCEPSS rescore
  19. 2026-08-05 19:18 UTCEG score recompute
  20. 2026-08-05 19:17 UTCEPSS rescore
  21. 2026-08-04 16:49 UTCEG score recompute
  22. 2026-08-04 15:10 UTCEPSS rescore
  23. 2026-08-04 10:39 UTCEPSS rescore
  24. 2026-08-03 15:23 UTCEG score recompute
  25. 2026-08-03 10:36 UTCEPSS rescore
  26. 2026-08-02 13:59 UTCEG score recompute
  27. 2026-08-02 02:27 UTCEPSS rescore
  28. 2026-08-01 12:35 UTCEG score recompute
  29. 2026-08-01 04:16 UTCEPSS rescore
  30. 2026-07-30 21:50 UTCEG score recompute
  31. 2026-07-30 16:28 UTCEPSS rescore
  32. 2026-07-30 08:21 UTCEG score recompute
  33. 2026-07-30 01:30 UTCEPSS rescore
  34. 2026-07-30 01:30 UTCEPSS rescore
  35. 2026-07-28 17:15 UTCEG score recompute
  36. 2026-07-28 15:37 UTCEPSS rescore
  37. 2026-07-27 15:35 UTCEG score recompute
  38. 2026-07-27 14:14 UTCEPSS rescore
  39. 2026-07-27 01:01 UTCEG score recompute
  40. 2026-07-26 14:54 UTCEPSS rescore
  41. 2026-07-26 14:54 UTCEPSS rescore
  42. 2026-07-26 12:18 UTCEG score recompute
  43. 2026-07-25 14:18 UTCEPSS rescore
  44. 2026-07-25 14:18 UTCEPSS rescore
  45. 2026-07-24 14:18 UTCEPSS rescore
  46. 2026-07-24 14:18 UTCEPSS rescore
  47. 2026-07-23 14:18 UTCEPSS rescore
  48. 2026-07-23 14:18 UTCEPSS rescore
  49. 2026-07-23 03:21 UTCEG score recompute
  50. 2026-07-22 14:08 UTCEPSS rescore
  51. 2026-07-22 14:08 UTCEPSS rescore
  52. 2026-07-21 15:25 UTCEPSS rescore
  53. 2026-07-21 15:25 UTCEPSS rescore
  54. 2026-07-20 17:08 UTCEPSS rescore
  55. 2026-07-19 14:31 UTCEPSS rescore
  56. 2026-07-19 02:29 UTCEPSS rescore
  57. 2026-07-18 10:04 UTCEPSS rescore
  58. 2026-07-16 17:03 UTCEPSS rescore
  59. 2026-07-15 16:57 UTCEPSS rescore
  60. 2026-07-15 16:57 UTCEPSS rescore
  61. 2026-07-15 02:00 UTCEPSS rescore
  62. 2026-07-15 02:00 UTCEPSS rescore
  63. 2026-07-13 22:31 UTCEPSS rescore
  64. 2026-07-13 06:13 UTCEPSS rescore
  65. 2026-07-13 06:13 UTCEPSS rescore
  66. 2026-07-12 05:46 UTCEPSS rescore
  67. 2026-07-11 08:27 UTCEPSS rescore
  68. 2026-07-11 08:27 UTCEPSS rescore
  69. 2026-07-09 17:57 UTCEG score recompute
  70. 2026-07-09 17:56 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59221?
CVE-2026-59221 is a high vulnerability published on July 9, 2026. Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, sanitizeproxypath in backend/openwebui/routers/terminals.py decoded proxy paths only eight times, allowing a nine-times percent-encoded ../ traversal value to pass normalization checks…
When was CVE-2026-59221 disclosed?
CVE-2026-59221 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59221 actively exploited?
CVE-2026-59221 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 60.4% of all scored CVEs.
What is the CVSS score of CVE-2026-59221?
CVE-2026-59221 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-59221?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59221, 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

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