CVE-2026-44588

CRITICALNVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 59% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.4Exploit: Elevated riskExposed services: Not assessed

A fixed version is listed under Patch Availability — apply it.

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, he tooltip mouseover handler in app/src/block/popover.ts reads aria-label via getAttribute and passes it through decodeURIComponent before assigning to messageElement.innerHTML in app/src/dialog/tooltip.ts:41. The encoder used at the producer side, escapeAriaLabel in app/src/util/escape.ts:19-25, only handles HTML special characters (", ', <, literal <) — it leaves %XX URL-escapes untouched. So a doc title containing %3Cimg src=x onerror=...%3E round-trips through escapeAriaLabel and the HTML attribute layer unmodified. Then decodeURIComponent on the consumer side converts %3C to a literal < character (a real <, NOT a character reference). When that string is assigned to innerHTML, the HTML5 tokenizer enters TagOpenState on the literal <, parses the element, and the onerror handler fires. Because the renderer runs with nodeIntegration: true, contextIsolation: false, webSecurity: false (app/electron/main.js:407-411), require('child_process') is reachable from the injected handler, escalating to arbitrary code execution.This vulnerability is fixed in 3.7.0.

CVSS v3
9.4
EG Score
9.4CRITICALmedium confidence
EG Risk
58
EG Risk 58/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity94% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.6%
EPSS %ILE
44th
KEV
Not listed

Published

May 14, 2026

Last Modified

May 15, 2026

Advisory Details (1)

Auto-updated Oct 2, 2026
🔬 Proof of concept available. Fixed version listed under Patch Availability. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

URL-encoded title bypasses `escapeAriaLabel`, decoded by `decodeURIComponent` into a tooltip-XSS => Electron renderer RCE in SiYuan · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-25rp-h46x-2hjm

Vendor Advisories for CVE-2026-44588(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—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 through 0.0.0-20260421031503-96dfe0bea474: no fix on record
  • every version on: no fix on record
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 326 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:12 UTCEPSS rescore
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  11. 2026-09-30 11:47 UTCOSV refresh
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  1. 2026-09-08 22:00 UTCEPSS rescore
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  13. 2026-08-23 21:44 UTCGHSA enrichment
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  22. 2026-08-20 19:35 UTCGHSA enrichment
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  26. 2026-08-17 14:41 UTCGHSA enrichment
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  29. 2026-08-17 10:22 UTCGHSA enrichment
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  37. 2026-08-14 22:51 UTCGHSA enrichment
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  42. 2026-08-14 02:24 UTCEG score recompute
  43. 2026-08-14 02:24 UTCGHSA enrichment
  44. 2026-08-13 22:00 UTCEPSS rescore
  45. 2026-08-13 08:14 UTCGHSA enrichment
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  47. 2026-08-12 23:09 UTCGHSA enrichment
  48. 2026-08-12 19:04 UTCGHSA enrichment
  49. 2026-08-12 14:58 UTCEG score recompute
  50. 2026-08-12 14:58 UTCGHSA enrichment
  51. 2026-08-12 13:51 UTCEPSS rescore
  52. 2026-08-11 23:34 UTCGHSA enrichment
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  58. 2026-08-11 00:52 UTCEG score recompute
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  71. 2026-08-09 01:49 UTCEG score recompute
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  73. 2026-08-08 16:37 UTCEPSS rescore
  74. 2026-08-08 11:20 UTCGHSA enrichment
  75. 2026-08-08 07:15 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-44588?
CVE-2026-44588 is a critical vulnerability published on May 14, 2026. SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, he tooltip mouseover handler in app/src/block/popover.ts reads aria-label via getAttribute and passes it through decodeURIComponent before assigning to messageElement.innerHTML in app/src/dialog/tooltip.ts:41. The…
When was CVE-2026-44588 disclosed?
CVE-2026-44588 was first published on May 14, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44588 actively exploited?
CVE-2026-44588 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44588?
CVE-2026-44588 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-44588?
A fixed version for CVE-2026-44588 is listed under Patch Availability on this page: update to the version listed for your package. The vendor advisories EchelonGraph has for CVE-2026-44588 are linked in the Vendor Advisories panel on this page.

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