CVE-2026-11422

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

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

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-05. A secondary CVSS source baseline 7.1; 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

Also known asEUVD-2026-34916 (ENISA EUVD) · GHSA-m48c-hxqg-4j76 (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
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: 0.2%CVSS: 7.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Markdown Preview Enhanced 0.8.x with crossnote engine 0.9.28 contains a code injection vulnerability in the WaveDrom rendering pipeline that allows attackers to execute arbitrary JavaScript by embedding malicious content in a wavedrom fenced code block within a crafted Markdown document. Attackers can exploit the unsanitized passing of wavedrom block content to window.eval() in the VS Code webview context to abuse the extension's message passing and invoke arbitrary file writes on the local filesystem.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
48
EG Risk 48/100

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)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 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
0.2%
EPSS %ILE
5th
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 (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-30). 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 5, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jun 11, 2026
Patch available. Sources: github_commit.
Web page

[BUG] [Security Vulnerability] Arbitrary File Write via WaveDrom eval() Code Injection in Markdown Preview Enhanced · Issue #2315 · shd101wyy/vscode-markdown-preview-enhanced · GitHub

https://github.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315
GitHub commit Patch Available

commit dcd80281c986 (shd101wyy/vscode-markdown-preview-enhanced)

Patch available: shd101wyy/vscode-markdown-preview-enhanced 0.8.28 (contains commit dcd80281c986)

https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77
GitHub commit Patch Available

commit 5588ca2121c3 (shd101wyy/crossnote)

Patch available: shd101wyy/crossnote 0.9.29 (contains commit 5588ca2121c3)

https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee

Vendor Advisories for CVE-2026-11422(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 8× in last 7d / 38× 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 284 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 184 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-31 05:35 UTCEG score recompute
  4. 2026-10-31 05:35 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  7. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-25 14:50 UTCEG score recompute
  11. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  12. 2026-10-24 12:22 UTCEG score recompute
  13. 2026-10-24 12:22 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  16. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  20. 2026-10-18 05:05 UTCEG score recompute
  21. 2026-10-17 19:08 UTCEG score recompute
  22. 2026-10-17 19:08 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  23. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
Show 75 more
  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-12 16:37 UTCEG score recompute
  4. 2026-10-11 20:13 UTCEG score recompute
  5. 2026-10-11 18:25 UTCEG score recompute
  6. 2026-10-11 14:59 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-03 11:09 UTCOSV refresh
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  21. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  24. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-09-14 05:00 UTCEG score recompute
  26. 2026-09-14 05:00 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  27. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  28. 2026-09-12 20:36 UTCOSV refresh
  29. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  30. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  31. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  32. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  33. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  34. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  35. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  36. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  37. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  38. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  39. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  40. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  41. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  42. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  43. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  44. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  45. 2026-08-25 01:49 UTCEG score recompute
  46. 2026-08-25 01:49 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  47. 2026-08-24 01:43 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  48. 2026-08-23 12:22 UTCEG score recompute
  49. 2026-08-23 12:22 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  50. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  51. 2026-08-22 01:51 UTCEG score recompute
  52. 2026-08-22 01:51 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  53. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  54. 2026-08-21 12:45 UTCEG score recompute
  55. 2026-08-21 12:45 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  56. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  57. 2026-08-20 22:43 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  58. 2026-08-20 09:37 UTCEG score recompute
  59. 2026-08-20 09:37 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  60. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  61. 2026-08-17 06:40 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  62. 2026-08-16 16:22 UTCEG score recompute
  63. 2026-08-16 16:22 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  64. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  65. 2026-08-16 03:04 UTCEG score recompute
  66. 2026-08-16 03:04 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  67. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  68. 2026-08-15 13:58 UTCEG score recompute
  69. 2026-08-15 13:58 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  70. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  71. 2026-08-15 00:42 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  72. 2026-08-14 11:36 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  73. 2026-08-13 22:30 UTCEG score recompute
  74. 2026-08-13 22:30 UTCGHSA enrichmentGHSA-m48c-hxqg-4j76 · GitHub severity HIGH · GitHub CVSS 7.1
  75. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile

Frequently asked(5)

What is CVE-2026-11422?
CVE-2026-11422 is a high-severity vulnerability; its CVE record was published on June 5, 2026. Markdown Preview Enhanced 0.8.x with crossnote engine 0.9.28 contains a code injection vulnerability in the WaveDrom rendering pipeline that allows attackers to execute arbitrary JavaScript by embedding malicious content in a wavedrom fenced code block within a crafted Markdown document. Attackers…
When was CVE-2026-11422 made public?
CVE-2026-11422 was made public on June 5, 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 June 5, 2026. EchelonGraph's copy of the record carries a last-modified date of July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-11422 actively exploited?
CVE-2026-11422 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-11422?
CVE-2026-11422 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-11422?
A fix for CVE-2026-11422 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-11422 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-11422

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