CVE-2026-41149

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
5.3EG
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: 0.5%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection under the default configuration. Specifically, the classDef directive in Mermaid state diagrams permits DOM injection that escapes the SVG context. However, tags are stripped, which prevents cross-site scripting (XSS). This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to immediately upgrade, they can work around this issue by setting "securityLevel": "sandbox", which prevents the issue by rendering the mermaid diagram in a sandboxed .

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
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
0.5%
EPSS %ILE
42nd
KEV
Not listed

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.

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

May 22, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jun 16, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Improper sanitization of `classDef` in state diagrams leads to HTML injection · Advisory · mermaid-js/mermaid · GitHub

https://github.com/mermaid-js/mermaid/security/advisories/GHSA-ghcm-xqfw-q4vr
GitHub commit Patch Available

commit 4e2d512bf5bf (mermaid-js/mermaid)

Patch available: mermaid-js/mermaid v10.9.6 (contains commit 4e2d512bf5bf)

https://github.com/mermaid-js/mermaid/commit/4e2d512bf5bf6f9de1a8f0a48da78dc4d09ac4f3
GitHub commit Patch Available

commit 37ff937f1da2 (mermaid-js/mermaid)

Patch available: mermaid-js/mermaid [email protected] (contains commit 37ff937f1da2)

https://github.com/mermaid-js/mermaid/commit/37ff937f1da2e19f882fd1db01235db4d01f4056

Vendor Advisories for CVE-2026-41149(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
node-mermaid8.11.0+ds+~cs29.13.22-1 ... 9.2.2+~2.0.0-2 (15 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-mermaid8.11.0+ds+~cs29.13.22-1 ... 9.2.2+~2.0.0-2 (16 versions)
  • every version on: no fix on record
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
mermaid—
  • 11.0.0-alpha.1 up to 11.15.0: fixed in 11.15.0
  • every version up to 10.9.6: fixed in 10.9.6
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 27× 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 99 of 180 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 81 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-41149?
CVE-2026-41149 is a medium-severity vulnerability; its CVE record was published on May 22, 2026. Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection under the default configuration. Specifically, the classDef directive in Mermaid state…
When was the CVE record for CVE-2026-41149 published?
The CVE record for CVE-2026-41149 was published on May 22, 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 July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-41149 actively exploited?
CVE-2026-41149 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-41149?
CVE-2026-41149 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-41149?
A fix for CVE-2026-41149 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-41149 are linked in the Vendor Advisories panel on this page.

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