CVE-2026-23733

CRITICALNVD 6.49.6
EchelonGraph scoreMEDIUM confidence

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

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-01-20. NVD baseline CVSS 6.4; sources differ by 3.2.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-3400 (ENISA EUVD) · GHSA-4gpc-rhpj-9443 (GitHub Security Advisories)Source: ENISA EUVD

9.6EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.4Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

LobeChat is an open source chat application platform. Prior to version 2.0.0-next.180, a stored Cross-Site Scripting (XSS) vulnerability in the Mermaid artifact renderer allows attackers to execute arbitrary JavaScript within the application context. This XSS can be escalated to Remote Code Execution (RCE) by leveraging the exposed electronAPI IPC bridge, allowing attackers to run arbitrary system commands on the victim's machine. Version 2.0.0-next.180 patches the issue.

CVSS v3
6.4
EG Score
9.6CRITICALmedium confidence
EG Risk
43
EG Risk 43/100

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)
Severity96% × 45%
Impact severity (EG Severity): CVSS 9.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
3rd
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 (9.6): severity, escalated by confirmed exploitation. This CVE's 9.6 is its impact severity (EG Severity), not escalated.

EG Severity
9.6 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). 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 every mission impact level.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 every mission impact level.

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (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

January 18, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Aug 6, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

Cross-Site Scripting(XSS) escalate to Remote Code Execution(RCE) · Advisory · lobehub/lobehub · GitHub

https://github.com/lobehub/lobe-chat/security/advisories/GHSA-4gpc-rhpj-9443

Vendor Advisories for CVE-2026-23733(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
npm@lobehub/chat—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)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@lobehub/chat—
  • every version through 1.143.2: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 57× 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 291 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 191 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 12:03 UTCEchelonGraph re-scored
  2. 2026-11-12 12:03 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  3. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-11-11 09:39 UTCEchelonGraph re-scored
  5. 2026-11-11 09:39 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  6. 2026-11-10 16:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-11-10 07:17 UTCEchelonGraph re-scored
  8. 2026-11-10 07:17 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  9. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-11-09 04:53 UTCEchelonGraph re-scored
  11. 2026-11-09 04:53 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  12. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-11-08 02:30 UTCEchelonGraph re-scored
  14. 2026-11-08 02:30 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  15. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-11-07 00:08 UTCEchelonGraph re-scored
  17. 2026-11-07 00:08 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  18. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-11-06 03:25 UTCOSV refresh
  20. 2026-11-05 21:43 UTCEchelonGraph re-scored
  21. 2026-11-05 21:43 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-11-04 19:20 UTCEchelonGraph re-scored
  24. 2026-11-04 19:20 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  25. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 75 more
  1. 2026-11-03 16:57 UTCEchelonGraph re-scored
  2. 2026-11-03 16:57 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  3. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-11-02 14:35 UTCEchelonGraph re-scored
  6. 2026-11-02 14:34 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  7. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-11-01 12:12 UTCEchelonGraph re-scored
  9. 2026-11-01 12:12 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  10. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-31 09:49 UTCEchelonGraph re-scored
  12. 2026-10-31 09:49 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-30 07:26 UTCEchelonGraph re-scored
  15. 2026-10-30 07:26 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  16. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-29 05:03 UTCEchelonGraph re-scored
  18. 2026-10-29 05:03 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  19. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-10-28 02:41 UTCEchelonGraph re-scored
  21. 2026-10-28 02:40 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-27 00:13 UTCEchelonGraph re-scored
  24. 2026-10-27 00:12 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  25. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-10-25 18:13 UTCEchelonGraph re-scored
  27. 2026-10-25 18:13 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  28. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  29. 2026-10-25 14:41 UTCEchelonGraph re-scored
  30. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  31. 2026-10-24 15:44 UTCEchelonGraph re-scored
  32. 2026-10-24 15:43 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  33. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  34. 2026-10-23 13:21 UTCEchelonGraph re-scored
  35. 2026-10-23 13:20 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  36. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  37. 2026-10-22 10:58 UTCEchelonGraph re-scored
  38. 2026-10-22 10:58 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  39. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  40. 2026-10-21 08:35 UTCEchelonGraph re-scored
  41. 2026-10-21 08:35 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  42. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  43. 2026-10-20 06:13 UTCEchelonGraph re-scored
  44. 2026-10-20 06:13 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  45. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  46. 2026-10-19 03:50 UTCEchelonGraph re-scored
  47. 2026-10-19 03:50 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  48. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  49. 2026-10-18 03:54 UTCEchelonGraph re-scored
  50. 2026-10-18 01:27 UTCEchelonGraph re-scored
  51. 2026-10-18 01:26 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  52. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  53. 2026-10-16 23:01 UTCEchelonGraph re-scored
  54. 2026-10-16 23:01 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  55. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  56. 2026-10-15 20:08 UTCEchelonGraph re-scored
  57. 2026-10-15 20:07 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  58. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  59. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  60. 2026-10-14 14:04 UTCEchelonGraph re-scored
  61. 2026-10-14 14:04 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  62. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  63. 2026-10-13 11:38 UTCEchelonGraph re-scored
  64. 2026-10-13 11:38 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  65. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  66. 2026-10-12 16:21 UTCEchelonGraph re-scored
  67. 2026-10-12 09:15 UTCGHSA enrichmentGHSA-4gpc-rhpj-9443 · GitHub severity CRITICAL · GitHub CVSS 9.6
  68. 2026-10-11 20:03 UTCEchelonGraph re-scored
  69. 2026-10-11 17:16 UTCEchelonGraph re-scored
  70. 2026-10-11 14:47 UTCEchelonGraph re-scored
  71. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  72. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  73. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  74. 2026-10-09 10:28 UTCOSV refresh
  75. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-23733?
CVE-2026-23733 is a critical-severity vulnerability; its CVE record was published on January 18, 2026. LobeChat is an open source chat application platform. Prior to version 2.0.0-next.180, a stored Cross-Site Scripting (XSS) vulnerability in the Mermaid artifact renderer allows attackers to execute arbitrary JavaScript within the application context. This XSS can be escalated to Remote Code…
When was the CVE record for CVE-2026-23733 published?
The CVE record for CVE-2026-23733 was published on January 18, 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 June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-23733 actively exploited?
CVE-2026-23733 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-23733?
CVE-2026-23733 has a CVSS v3 base score of 6.4 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 9.6 (CRITICAL).
How do I remediate CVE-2026-23733?
The CVE record for CVE-2026-23733 names the fix: "Version 2.0.0-next.180 patches the issue." The vendor advisories EchelonGraph has for CVE-2026-23733 are linked in the Vendor Advisories panel on this page.

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