CVE-2026-54067

CRITICALPre-NVD 9.99.9
EchelonGraph scoreMEDIUM confidence

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

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-10. A secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-39123 (ENISA EUVD) · GHSA-mvjr-vv3c-w4qv (GitHub Security Advisories) · GO-2026-5963 (OSV.dev)Source: ENISA EUVD

9.9EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 9.9Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, CSS snippet body containing breaks out of its surrounding tag when renderSnippet() interpolates it via insertAdjacentHTML. A payload like runs arbitrary JavaScript in the renderer. On Electron desktop builds the renderer runs with nodeIntegration:true, so require('child_process') is reachable from the injected handler and the XSS chains to host RCE. Snippets sync via the workspace repository, so an attacker with write access to any synced workspace plants the payload once and it fires on every device that pulls. The bug also bypasses the user's enabledCSS / enabledJS separation. A user who turned enabledJS off was making a deliberate call not to run untrusted JavaScript; the CSS path runs it anyway. This vulnerability is fixed in 3.7.0.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
61
EG Risk 61/100

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)
Severity99% × 45%
Impact severity (EG Severity): CVSS 9.9 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, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
32nd
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 (9.9): severity, escalated by confirmed exploitation. This CVE's 9.9 is its impact severity (EG Severity), not escalated.

EG Severity
9.9 CRITICALCVSS-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 2026-11-12). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 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, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 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 total (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

June 24, 2026

Last Modified

October 25, 2026

Advisory Details (1)

Auto-updated Nov 9, 2026
🔬 Proof of concept available. Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Stored XSS to RCE via CSS-snippet <style> breakout in renderSnippet() · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvjr-vv3c-w4qv

Vendor Advisories for CVE-2026-54067(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
gogithub.com/siyuan-note/siyuan/kernel @ 0.0.0-20260628153353-2d5d72223df4 (fixes < 0.0.0-20260628153353-2d5d72223df4)—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)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/siyuan-note/siyuan/kernel—
  • every version up to 0.0.0-20260628153353-2d5d72223df4: fixed in 0.0.0-20260628153353-2d5d72223df4
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 45× 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 230 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 130 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 04:26 UTCEchelonGraph re-scored
  2. 2026-11-13 04:26 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  3. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-11-12 05:40 UTCEchelonGraph re-scored
  5. 2026-11-12 05:40 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  6. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-11-11 06:54 UTCEchelonGraph re-scored
  8. 2026-11-11 06:54 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  9. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-11-10 08:08 UTCEchelonGraph re-scored
  11. 2026-11-10 08:08 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  12. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-11-09 09:20 UTCEchelonGraph re-scored
  14. 2026-11-09 09:20 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  15. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-11-08 10:34 UTCEchelonGraph re-scored
  17. 2026-11-08 10:34 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  18. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-11-07 11:47 UTCEchelonGraph re-scored
  20. 2026-11-07 11:47 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  21. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-11-06 13:01 UTCEchelonGraph re-scored
  23. 2026-11-06 13:01 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  24. 2026-11-06 11:55 UTCOSV refresh
  25. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 75 more
  1. 2026-11-05 14:15 UTCEchelonGraph re-scored
  2. 2026-11-05 14:15 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  3. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-11-04 15:29 UTCEchelonGraph re-scored
  5. 2026-11-04 15:29 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  6. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-11-03 16:40 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  8. 2026-11-02 17:44 UTCEchelonGraph re-scored
  9. 2026-11-02 17:44 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  10. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-11-01 18:57 UTCEchelonGraph re-scored
  12. 2026-11-01 18:57 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  13. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-11-01 07:45 UTCGHSA enrichmentGHSA-mvjr-vv3c-w4qv · GitHub severity CRITICAL · GitHub CVSS 9.9
  15. 2026-11-01 07:45 UTCEchelonGraph re-scored
  16. 2026-10-31 20:11 UTCEchelonGraph re-scored
  17. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-10-30 21:25 UTCEchelonGraph re-scored
  19. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-10-29 22:39 UTCEchelonGraph re-scored
  21. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-28 23:53 UTCEchelonGraph re-scored
  23. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-28 01:07 UTCEchelonGraph re-scored
  25. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  26. 2026-10-27 02:18 UTCEchelonGraph re-scored
  27. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  28. 2026-10-25 23:28 UTCEchelonGraph re-scored
  29. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  30. 2026-10-25 14:20 UTCEchelonGraph re-scored
  31. 2026-10-24 17:01 UTCEchelonGraph re-scored
  32. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  33. 2026-10-23 18:16 UTCEchelonGraph re-scored
  34. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  35. 2026-10-22 19:13 UTCEchelonGraph re-scored
  36. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  37. 2026-10-21 20:19 UTCEchelonGraph re-scored
  38. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  39. 2026-10-20 21:32 UTCEchelonGraph re-scored
  40. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  41. 2026-10-19 22:46 UTCEchelonGraph re-scored
  42. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  43. 2026-10-18 22:03 UTCEchelonGraph re-scored
  44. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  45. 2026-10-18 03:31 UTCEchelonGraph re-scored
  46. 2026-10-17 22:45 UTCEchelonGraph re-scored
  47. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  48. 2026-10-16 23:57 UTCEchelonGraph re-scored
  49. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  50. 2026-10-15 20:51 UTCEchelonGraph re-scored
  51. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  52. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  53. 2026-10-14 14:57 UTCEchelonGraph re-scored
  54. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  55. 2026-10-13 14:22 UTCEchelonGraph re-scored
  56. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  57. 2026-10-12 15:33 UTCEchelonGraph re-scored
  58. 2026-10-11 19:40 UTCEchelonGraph re-scored
  59. 2026-10-11 16:55 UTCEchelonGraph re-scored
  60. 2026-10-11 14:18 UTCEchelonGraph re-scored
  61. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  62. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  63. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  64. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  65. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  66. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  67. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  68. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  69. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  70. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  71. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  72. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  73. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  74. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  75. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile

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Frequently asked(5)

What is CVE-2026-54067?
CVE-2026-54067 is a critical-severity vulnerability; its CVE record was published on June 24, 2026. SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, CSS snippet body containing </style> breaks out of its surrounding <style> tag when renderSnippet() interpolates it via insertAdjacentHTML. A payload like runs arbitrary JavaScript in the renderer. On Electron desktop…
When was the CVE record for CVE-2026-54067 published?
The CVE record for CVE-2026-54067 was published on June 24, 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 October 25, 2026; the record at its source may have been updated since.
Is CVE-2026-54067 actively exploited?
CVE-2026-54067 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54067?
CVE-2026-54067 has a CVSS base score of 9.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54067?
A fix for CVE-2026-54067 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54067 are linked in the Vendor Advisories panel on this page.

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