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
Elevated

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
35th
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 2026-11-07). 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 8× in last 7d / 33× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 160 rows 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 60 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

Dependency Blast Radius

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