CVE-2026-70483

MEDIUMNVD 4.34.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 3.1 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-08-04) is not newer than that change (2026-09-18), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekElevated

Also known asEUVD-2026-52888 (ENISA EUVD) · GHSA-3vf6-64vr-3g56 (GitHub Security Advisories) · PYSEC-2026-3640 (OSV.dev)Source: ENISA EUVD

4.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 4.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat's in-flight tasks before checking whether the caller could delete that chat. Any authenticated user who knew another user's chat id could abort that user's running model response, title generation, or tag generation, even though the delete was refused and no chat data was deleted, modified, or disclosed. This issue is fixed in 0.11.0.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity43% × 45%
Impact severity (EG Severity): CVSS 4.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.3): severity, escalated by confirmed exploitation. This CVE's 4.3 is its impact severity (EG Severity), not escalated.

EG Severity
4.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 4, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Sep 18, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Any authenticated user can cancel another user's chat generation via the chat delete endpoint · Advisory · open-webui/open-webui · GitHub

https://github.com/open-webui/open-webui/security/advisories/GHSA-3vf6-64vr-3g56
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 pull request

fix: authorize before cancelling tasks in the chat delete endpoint

Fix merged in open-webui/open-webui PR #27006 on 2026-07-26 — awaiting tagged release

https://github.com/open-webui/open-webui/pull/27006
GitHub commit

commit 4f93c3e36c17 (open-webui/open-webui)

Fix landed in open-webui/open-webui commit 4f93c3e36c17 — awaiting tagged release

https://github.com/open-webui/open-webui/commit/4f93c3e36c1734342a32c312bdb0516c66d8e93c

Vendor Advisories for CVE-2026-70483(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
pipopen-webui @ 0.11.0 (fixes >= 0.9.6, < 0.11.0)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
open-webui0.10.0, 0.10.1, 0.10.2, 0.9.6
  • 0.9.6 up to 0.11.0: fixed in 0.11.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 43× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 120 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 21 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-11-01 07:40 UTCGHSA enrichmentGHSA-3vf6-64vr-3g56 · GitHub severity LOW · GitHub CVSS 3.1
  4. 2026-11-01 07:40 UTCEG score recompute
  5. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  7. 2026-10-30 07:25 UTCOSV refresh
  8. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-25 14:08 UTCEG score recompute
  14. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-10-22 19:30 UTCEG score recompute
  17. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-10-18 03:18 UTCEG score recompute
  23. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  25. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
Show 74 more
  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  4. 2026-10-12 15:43 UTCEG score recompute
  5. 2026-10-11 19:29 UTCEG score recompute
  6. 2026-10-11 16:44 UTCEG score recompute
  7. 2026-10-11 14:04 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-06 23:41 UTCEG score recompute
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-05 19:41 UTCEG score recompute
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  18. 2026-10-04 06:09 UTCEG score recompute
  19. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  21. 2026-10-02 10:06 UTCEG score recompute
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  23. 2026-10-01 02:25 UTCEG score recompute
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  25. 2026-09-29 06:25 UTCEG score recompute
  26. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  27. 2026-09-27 17:59 UTCEG score recompute
  28. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  29. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  30. 2026-09-25 04:40 UTCEG score recompute
  31. 2026-09-23 22:26 UTCEG score recompute
  32. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  33. 2026-09-23 00:49 UTCEG score recompute
  34. 2026-09-22 03:12 UTCEG score recompute
  35. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  36. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  37. 2026-09-20 11:02 UTCEG score recompute
  38. 2026-09-19 13:23 UTCEG score recompute
  39. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  40. 2026-09-18 15:05 UTCEG score recompute▲ 1.20
  41. 2026-09-18 15:02 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
  42. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  43. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  44. 2026-09-15 09:41 UTCEG score recompute
  45. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  46. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  47. 2026-09-12 03:22 UTCEG score recompute
  48. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  49. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  50. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  51. 2026-09-08 21:02 UTCEG score recompute
  52. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  53. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  54. 2026-09-05 18:32 UTCEG score recompute
  55. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  56. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  57. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  58. 2026-09-02 07:41 UTCEG score recompute
  59. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  60. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  61. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  62. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  63. 2026-08-29 21:45 UTCEG score recompute
  64. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  65. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  66. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  67. 2026-08-25 10:30 UTCEG score recompute
  68. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  69. 2026-08-22 04:11 UTCEG score recompute
  70. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  71. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  72. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  73. 2026-08-18 21:51 UTCEG score recompute
  74. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile

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Frequently asked(5)

What is CVE-2026-70483?
CVE-2026-70483 is a medium-severity vulnerability; its CVE record was published on August 4, 2026. Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat's in-flight tasks before checking whether the caller could delete that chat. Any authenticated user who knew another user's chat id could abort…
When was the CVE record for CVE-2026-70483 published?
The CVE record for CVE-2026-70483 was published on August 4, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-70483 actively exploited?
CVE-2026-70483 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70483?
CVE-2026-70483 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-70483?
A fix for CVE-2026-70483 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70483 are linked in the Vendor Advisories panel on this page.

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