CVE-2026-65606

CRITICALPre-NVD 9.69.6
EchelonGraph scoreMEDIUM confidence

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

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-23. A secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
9.6EG
EchelonGraph verdictPlan mitigationRemediate 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: 0.8%CVSS: 9.6Exploit: No code on recordExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/ link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child_process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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.
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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.8%
EPSS %ILE
55th
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
0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-19). 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: 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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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.

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

July 23, 2026

Last Modified

September 17, 2026

Advisory Details (3)

Auto-updated Oct 7, 2026
Fix referenced — no release confirmed yet. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

`siyuan://` tab icon XSS to RCE · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wp64-x7qh-h728
Web page

SiYuan before v3.7.2 Cross-Site Scripting to RCE | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-cross-site-scripting-to-rce
GitHub commit

commit 41f2861c8757 (siyuan-note/siyuan)

Fix landed in siyuan-note/siyuan commit 41f2861c8757 — awaiting tagged release

https://github.com/siyuan-note/siyuan/commit/41f2861c87575ff5ac4b50a0520b1a4fe55b4a70

Vendor Advisories for CVE-2026-65606(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 68× 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 438 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 338 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-20 02:22 UTCEG score recompute
  2. 2026-10-20 02:22 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  3. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  4. 2026-10-19 01:44 UTCEG score recompute
  5. 2026-10-19 01:44 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  6. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  7. 2026-10-18 03:58 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  8. 2026-10-18 03:21 UTCEG score recompute
  9. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  10. 2026-10-17 06:11 UTCEG score recompute
  11. 2026-10-17 06:11 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  12. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  13. 2026-10-16 07:17 UTCEG score recompute
  14. 2026-10-16 07:17 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  15. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-10-15 06:13 UTCEG score recompute
  17. 2026-10-15 06:12 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  18. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  19. 2026-10-14 01:48 UTCEG score recompute
  20. 2026-10-14 01:48 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-10-12 22:01 UTCEG score recompute
  23. 2026-10-12 22:01 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  25. 2026-10-12 15:46 UTCEG score recompute
Show 75 more
  1. 2026-10-12 06:04 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  2. 2026-10-11 19:31 UTCEG score recompute
  3. 2026-10-11 16:47 UTCEG score recompute
  4. 2026-10-11 14:08 UTCEG score recompute
  5. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  6. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  7. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  8. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  9. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  10. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  11. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  12. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  13. 2026-10-04 12:43 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  14. 2026-10-04 08:23 UTCEG score recompute
  15. 2026-10-04 08:23 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  17. 2026-10-03 03:25 UTCEG score recompute
  18. 2026-10-03 03:25 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  19. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  20. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  21. 2026-10-01 14:10 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-10-01 10:17 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  23. 2026-10-01 06:18 UTCEG score recompute
  24. 2026-10-01 06:18 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  26. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  27. 2026-09-28 13:03 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  28. 2026-09-28 08:49 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  29. 2026-09-28 05:07 UTCEG score recompute
  30. 2026-09-28 05:07 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  31. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  32. 2026-09-24 10:13 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  33. 2026-09-24 06:31 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  34. 2026-09-24 02:06 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  35. 2026-09-23 22:21 UTCEG score recompute
  36. 2026-09-23 22:21 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  37. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  38. 2026-09-23 09:52 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  39. 2026-09-23 06:10 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  40. 2026-09-23 02:27 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  41. 2026-09-22 22:44 UTCEG score recompute
  42. 2026-09-22 22:44 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  43. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  44. 2026-09-20 05:44 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  45. 2026-09-20 01:48 UTCEG score recompute
  46. 2026-09-20 01:47 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  47. 2026-09-18 22:36 UTCEG score recompute
  48. 2026-09-18 22:36 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  49. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  50. 2026-09-18 10:47 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  51. 2026-09-18 06:50 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  52. 2026-09-18 03:07 UTCEG score recompute
  53. 2026-09-18 03:07 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  54. 2026-09-17 18:27 UTCEG score recompute
  55. 2026-09-17 18:27 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  56. 2026-09-17 18:13 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  57. 2026-09-17 09:18 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  58. 2026-09-17 02:02 UTCEG score recompute
  59. 2026-09-17 02:02 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  60. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  61. 2026-09-16 12:00 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  62. 2026-09-16 06:51 UTCEG score recompute
  63. 2026-09-16 06:51 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  64. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  65. 2026-09-14 16:17 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  66. 2026-09-14 09:30 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  67. 2026-09-14 05:48 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  68. 2026-09-14 02:05 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  69. 2026-09-13 22:23 UTCEG score recompute
  70. 2026-09-13 22:23 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  71. 2026-09-13 16:10 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  72. 2026-09-13 12:23 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  73. 2026-09-13 08:40 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  74. 2026-09-13 04:58 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6
  75. 2026-09-13 01:15 UTCGHSA enrichmentGHSA-3vr3-hq5c-q2w9 · GitHub severity CRITICAL · GitHub CVSS 9.6

Frequently asked(5)

What is CVE-2026-65606?
CVE-2026-65606 is a critical-severity vulnerability; its CVE record was published on July 23, 2026. SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/<name> link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML…
When was CVE-2026-65606 made public?
CVE-2026-65606 was made public on July 10, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 23, 2026. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-65606 actively exploited?
CVE-2026-65606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (55th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-65606?
CVE-2026-65606 has a CVSS base score of 9.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-65606?
A fix for CVE-2026-65606 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-65606 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-65606

Explore →

Is Your Infrastructure Affected by CVE-2026-65606?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.