CVE-2026-32940

CRITICALNVD 6.19.3
EchelonGraph scoreMEDIUM confidence

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

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-17. NVD baseline CVSS 6.1; sources differ by 3.2.

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

Also known asEUVD-2026-13523 (ENISA EUVD) · GHSA-4mx9-3c2h-hwhg (GitHub Security Advisories) · GO-2026-4721 (OSV.dev)Source: ENISA EUVD

9.3EG
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: 0.3%CVSS: 6.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

SiYuan is a personal knowledge management system. In versions 3.6.0 and below, SanitizeSVG has an incomplete blocklist — it blocks data:text/html and data:image/svg+xml in href attributes but misses data:text/xml and data:application/xml, both of which can render SVG with JavaScript execution. The unauthenticated /api/icon/getDynamicIcon endpoint serves user-controlled input (via the content parameter) directly into SVG markup using fmt.Sprintf with no escaping, served as Content-Type: image/svg+xml. This creates a click-through XSS: a victim navigates to a crafted URL, sees an SVG with an injected link, and clicking it triggers JavaScript via the bypassed MIME types. The attack requires direct navigation to the endpoint or / embedding, since tag rendering in the frontend doesn't allow interactive links. This issue has been fixed in version 3.6.1.

CVSS v3
6.1
EG Score
9.3CRITICALmedium confidence
EG Risk
58
EG Risk 58/100

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)
Severity93% × 45%
Impact severity (EG Severity): CVSS 9.3 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
0.3%
EPSS %ILE
24th
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 (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.

EG Severity
9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% 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 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

March 20, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub advisoryMentions a patch (unverified)

SanitizeSVG bypass via data:text/xml in getDynamicIcon (incomplete fix for CVE-2026-29183) · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4mx9-3c2h-hwhg
GitHub release Patch Available

Improve details

Patch available: siyuan-note/siyuan v3.6.1

https://github.com/siyuan-note/siyuan/releases/tag/v3.6.1
GitHub commit

commit d01d561875d4 (siyuan-note/siyuan)

Fix landed in siyuan-note/siyuan commit d01d561875d4 — awaiting tagged release

https://github.com/siyuan-note/siyuan/commit/d01d561875d4f744e9f6232f1d4831e3642b8696
GitHub advisoryMentions a patch (unverified)

SiYuan: Unauthenticated Reflected XSS via SVG Injection in /api/icon/getDynamicIcon Endpoint · CVE-2026-29183 · GitHub Advisory Database · GitHub

https://github.com/advisories/GHSA-6865-qjcf-286f

Vendor Advisories for CVE-2026-32940(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—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—
  • every version through 0.0.0-20260313024916-fd6526133bb3: no fix on record
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 60× 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 216 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 116 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 04:55 UTCEchelonGraph re-scored
  2. 2026-11-13 04:55 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  3. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-11-12 03:55 UTCEchelonGraph re-scored
  5. 2026-11-12 03:55 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  6. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-11-11 02:55 UTCEchelonGraph re-scored
  8. 2026-11-11 02:55 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  9. 2026-11-10 16:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-11-10 01:48 UTCEchelonGraph re-scored
  11. 2026-11-10 01:48 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  12. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-11-09 00:48 UTCEchelonGraph re-scored
  14. 2026-11-09 00:48 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  15. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-11-07 23:49 UTCEchelonGraph re-scored
  17. 2026-11-07 23:49 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  18. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  19. 2026-11-06 22:49 UTCEchelonGraph re-scored
  20. 2026-11-06 22:49 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  21. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-11-06 05:55 UTCOSV refresh
  23. 2026-11-05 21:50 UTCEchelonGraph re-scored
  24. 2026-11-05 21:50 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  25. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
Show 75 more
  1. 2026-11-04 20:51 UTCEchelonGraph re-scored
  2. 2026-11-04 20:51 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  3. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  4. 2026-11-03 19:51 UTCEchelonGraph re-scored
  5. 2026-11-03 19:51 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  6. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  7. 2026-11-02 18:52 UTCEchelonGraph re-scored
  8. 2026-11-02 18:52 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  9. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-11-01 17:51 UTCEchelonGraph re-scored
  11. 2026-11-01 17:51 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  12. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-10-31 16:52 UTCEchelonGraph re-scored
  14. 2026-10-31 16:52 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  15. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  16. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-10-30 15:34 UTCEchelonGraph re-scored
  18. 2026-10-30 15:34 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  19. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  20. 2026-10-29 14:33 UTCEchelonGraph re-scored
  21. 2026-10-29 14:33 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  22. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  23. 2026-10-28 13:34 UTCEchelonGraph re-scored
  24. 2026-10-28 13:34 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  25. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  26. 2026-10-27 12:23 UTCEchelonGraph re-scored
  27. 2026-10-27 12:23 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  28. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  29. 2026-10-26 11:23 UTCEchelonGraph re-scored
  30. 2026-10-26 11:23 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  31. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  32. 2026-10-25 14:35 UTCEchelonGraph re-scored
  33. 2026-10-25 10:24 UTCEchelonGraph re-scored
  34. 2026-10-25 10:24 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  35. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  36. 2026-10-24 09:24 UTCEchelonGraph re-scored
  37. 2026-10-24 09:24 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  38. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  39. 2026-10-23 08:24 UTCEchelonGraph re-scored
  40. 2026-10-23 08:24 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  41. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  42. 2026-10-22 07:22 UTCEchelonGraph re-scored
  43. 2026-10-22 07:22 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  44. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  45. 2026-10-21 06:22 UTCEchelonGraph re-scored
  46. 2026-10-21 06:22 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  47. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  48. 2026-10-20 05:22 UTCEchelonGraph re-scored
  49. 2026-10-20 05:22 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  50. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  51. 2026-10-19 04:21 UTCEchelonGraph re-scored
  52. 2026-10-19 04:21 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  53. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  54. 2026-10-18 03:20 UTCEchelonGraph re-scored
  55. 2026-10-18 03:19 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  56. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  57. 2026-10-17 02:17 UTCEchelonGraph re-scored
  58. 2026-10-17 02:16 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  59. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  60. 2026-10-16 01:15 UTCEchelonGraph re-scored
  61. 2026-10-16 01:15 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  62. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  63. 2026-10-14 20:24 UTCEchelonGraph re-scored
  64. 2026-10-14 20:23 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  65. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  66. 2026-10-13 16:37 UTCEchelonGraph re-scored
  67. 2026-10-13 16:37 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  68. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  69. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  70. 2026-10-12 15:35 UTCEchelonGraph re-scored
  71. 2026-10-12 15:35 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  72. 2026-10-12 08:29 UTCGHSA enrichmentGHSA-4mx9-3c2h-hwhg · GitHub severity CRITICAL · GitHub CVSS 9.3
  73. 2026-10-11 19:56 UTCEchelonGraph re-scored
  74. 2026-10-11 17:09 UTCEchelonGraph re-scored
  75. 2026-10-11 14:36 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-32940?
CVE-2026-32940 is a critical-severity vulnerability; its CVE record was published on March 20, 2026. SiYuan is a personal knowledge management system. In versions 3.6.0 and below, SanitizeSVG has an incomplete blocklist — it blocks data:text/html and data:image/svg+xml in href attributes but misses data:text/xml and data:application/xml, both of which can render SVG with JavaScript execution. The…
When was the CVE record for CVE-2026-32940 published?
The CVE record for CVE-2026-32940 was published on March 20, 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-2026-32940 actively exploited?
CVE-2026-32940 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-32940?
CVE-2026-32940 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 9.3 (CRITICAL).
How do I remediate CVE-2026-32940?
A fix for CVE-2026-32940 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-32940 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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