CVE-2026-70492

HIGHNVD 5.48.7
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 8.7 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. NVD baseline CVSS 5.4; sources differ by 3.3.

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

Also known asEUVD-2026-52923 (ENISA EUVD) · GHSA-pwxh-7358-jq2x (GitHub Security Advisories) · PYSEC-2026-3650 (OSV.dev)Source: ENISA EUVD

8.7EG
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: 0.4%CVSS: 5.4Exploit: 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 0.10.0 until 0.11.0, src/lib/components/chat/Messages/Markdown/KatexRenderer.svelte could store and render a chat message whose math block makes KaTeX fail with a stack overflow instead of a parse error. The catch branch fell back to inserting the original math source into the page as HTML through {@html} rather than as text, so script in the message runs in the browser of whoever views it, including shared chats and channels. The viewer's session token in localStorage can be stolen, and an administrator viewer can have their account taken over. This issue is fixed in 0.11.0.

CVSS v3
5.4
EG Score
8.7HIGHmedium confidence
EG Risk
55
EG Risk 55/100

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)
Severity87% × 45%
Impact severity (EG Severity): CVSS 8.7 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
0.4%
EPSS %ILE
34th
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 (8.7): severity, escalated by confirmed exploitation. This CVE's 8.7 is its impact severity (EG Severity), not escalated.

EG Severity
8.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% 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 Aug 4, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Stored XSS via unescaped KaTeX render-error fallback in rendered messages · Advisory · open-webui/open-webui · GitHub

Affected: 0.11.0 by commit

https://github.com/open-webui/open-webui/security/advisories/GHSA-pwxh-7358-jq2x
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: escape KaTeX render-error fallback to prevent XSS via {@html}

Fix merged in open-webui/open-webui PR #26718 on 2026-07-27 — awaiting tagged release

https://github.com/open-webui/open-webui/pull/26718
GitHub commit

commit bc600d3f0858 (open-webui/open-webui)

Fix landed in open-webui/open-webui commit bc600d3f0858 — awaiting tagged release

https://github.com/open-webui/open-webui/commit/bc600d3f085802c45aa8f38c30e6e8c986bde6cc

Vendor Advisories for CVE-2026-70492(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 >= 0.10.0, < 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
  • 0.10.0 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 100 of 146 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. None are among the latest 100 rows. The 46 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  2. 2026-11-01 07:40 UTCGHSA enrichmentGHSA-pwxh-7358-jq2x · GitHub severity HIGH · GitHub CVSS 8.7
  3. 2026-11-01 07:40 UTCEG score recompute▲ 3.30
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  6. 2026-10-30 07:25 UTCOSV refresh
  7. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-10-25 14:08 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-22 19:30 UTCEG score recompute
  16. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  19. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-10-18 03:18 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  23. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 75 more
  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-12 15:43 UTCEG score recompute
  4. 2026-10-11 19:29 UTCEG score recompute
  5. 2026-10-11 16:44 UTCEG score recompute
  6. 2026-10-11 14:04 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-06 23:41 UTCEG score recompute
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-05 19:40 UTCEG score recompute
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-04 06:09 UTCEG score recompute
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-10-02 10:06 UTCEG score recompute
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-01 02:25 UTCEG score recompute
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-09-29 06:24 UTCEG score recompute
  25. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  26. 2026-09-27 17:59 UTCEG score recompute
  27. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  28. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  29. 2026-09-25 09:09 UTCEG score recompute
  30. 2026-09-24 06:42 UTCEG score recompute
  31. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  32. 2026-09-23 04:58 UTCEG score recompute
  33. 2026-09-22 03:10 UTCEG score recompute
  34. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  35. 2026-09-20 20:51 UTCEG score recompute
  36. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  37. 2026-09-19 17:43 UTCEG score recompute
  38. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  39. 2026-09-18 15:04 UTCEG score recompute▼ 3.30
  40. 2026-09-18 15:02 UTCNVD updateCVSS v3 → 5.4 · severity → MEDIUM
  41. 2026-09-18 04:28 UTCEG score recompute
  42. 2026-09-17 01:10 UTCEG score recompute
  43. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  44. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  45. 2026-09-15 06:53 UTCEG score recompute
  46. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  47. 2026-09-14 04:43 UTCEG score recompute
  48. 2026-09-12 15:52 UTCEG score recompute
  49. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  50. 2026-09-11 15:22 UTCEG score recompute
  51. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  52. 2026-09-10 14:51 UTCEG score recompute
  53. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  54. 2026-09-09 09:18 UTCEG score recompute
  55. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  56. 2026-09-07 18:29 UTCEG score recompute
  57. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  58. 2026-09-06 19:11 UTCEG score recompute
  59. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  60. 2026-09-05 18:31 UTCEG score recompute
  61. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  62. 2026-09-05 04:03 UTCEG score recompute
  63. 2026-09-04 10:07 UTCEG score recompute
  64. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  65. 2026-09-03 07:19 UTCEG score recompute
  66. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  67. 2026-09-01 20:48 UTCEG score recompute
  68. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  69. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  70. 2026-08-30 22:14 UTCEG score recompute
  71. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  72. 2026-08-30 09:59 UTCEG score recompute
  73. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  74. 2026-08-29 21:43 UTCEG score recompute
  75. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 19th percentile

Frequently asked(5)

What is CVE-2026-70492?
CVE-2026-70492 is a high-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 0.10.0 until 0.11.0, src/lib/components/chat/Messages/Markdown/KatexRenderer.svelte could store and render a chat message whose math block makes KaTeX fail with a stack overflow instead of a parse error. The…
When was the CVE record for CVE-2026-70492 published?
The CVE record for CVE-2026-70492 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-2026-70492 actively exploited?
CVE-2026-70492 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70492?
CVE-2026-70492 has a CVSS v3 base score of 5.4 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 8.7 (HIGH).
How do I remediate CVE-2026-70492?
A fix for CVE-2026-70492 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70492 are linked in the Vendor Advisories panel on this page.

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