CVE-2026-41148

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (47th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 5.3Exploit: None knownExposed 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 prior, in addition to 11.0.0-alpha.1 through 11.12.0 are vulnerable to CSS injection through improper sanitization. The state diagram (and any other diagram type that routes user-controlled style strings through the createCssStyles parser) captures classDef values using an unrestricted regex that matches everything up to a newline. That value then flows unsanitized through addStyleClass() into createCssStyles() and is assigned to style.innerHTML, so a closing brace (}) in the value terminates the generated CSS selector and turns everything after it into a new CSS rule on the page. This enables page defacement, user tracking via url() callbacks, and DOM attribute exfiltration. 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
24
EG Risk 24/100

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.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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
0.6%
EPSS %ILE
47th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (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 (6)

Auto-updated Jun 15, 2026
Patch available. Sources: github, github_commit, github_release.
Web page

Mermaid Config Schema | Mermaid

https://mermaid.js.org/config/schema-docs/config.html#securitylevel
GitHub release Patch Available

v10.9.6

Patch available: mermaid-js/mermaid v10.9.6

https://github.com/mermaid-js/mermaid/releases/tag/v10.9.6
GitHub release Patch Available

[email protected]

Patch available: mermaid-js/mermaid [email protected]

https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.15.0
GitHub commit Patch Available

commit e9b0f34d8d82 (mermaid-js/mermaid)

Patch available: mermaid-js/mermaid [email protected] (contains commit e9b0f34d8d82)

https://github.com/mermaid-js/mermaid/commit/e9b0f34d8d82a6260077764ee45e1d7d90957a0f
GitHub commit Patch Available

commit 8fead23c5916 (mermaid-js/mermaid)

Patch available: mermaid-js/mermaid v10.9.6 (contains commit 8fead23c5916)

https://github.com/mermaid-js/mermaid/commit/8fead23c59166b7bab6a39eac81acebee2859102
GitHub advisoryMentions a patch (unverified)

Improper sanitization of `classDefs` in diagrams leads to CSS injection · Advisory · mermaid-js/mermaid · GitHub

https://github.com/mermaid-js/mermaid/security/advisories/GHSA-xcj9-5m2h-648r

Vendor Advisories for CVE-2026-41148(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 0.6% · 47th percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 47th 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 0.6% · 47th percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  21. 2026-09-30 02:39 UTCOSV refresh
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  24. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  25. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 27th percentile
Show 74 more
  1. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  2. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  3. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  4. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  5. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  6. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  7. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-09-11 03:53 UTCOSV refresh
  10. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  11. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  12. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  14. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  15. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  16. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  17. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  18. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  19. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  20. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  21. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  22. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  23. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  24. 2026-08-23 16:39 UTCEG score recompute
  25. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  26. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  27. 2026-08-21 21:40 UTCEG score recompute
  28. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  29. 2026-08-20 18:38 UTCEG score recompute
  30. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  31. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  32. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  33. 2026-08-17 09:43 UTCEG score recompute
  34. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  35. 2026-08-16 03:18 UTCEG score recompute
  36. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  37. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  38. 2026-08-14 01:51 UTCEG score recompute
  39. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  40. 2026-08-12 21:38 UTCEG score recompute
  41. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  42. 2026-08-11 23:03 UTCEG score recompute
  43. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  44. 2026-08-11 00:28 UTCEG score recompute
  45. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  46. 2026-08-09 23:54 UTCEG score recompute
  47. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  48. 2026-08-09 01:20 UTCEG score recompute
  49. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  50. 2026-08-07 18:20 UTCEG score recompute
  51. 2026-08-06 19:45 UTCEG score recompute
  52. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  53. 2026-08-05 21:10 UTCEG score recompute
  54. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  55. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  56. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  57. 2026-08-03 16:46 UTCEG score recompute
  58. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  59. 2026-08-02 15:45 UTCEG score recompute
  60. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  61. 2026-08-01 17:10 UTCEG score recompute
  62. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  63. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  64. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  65. 2026-07-29 17:28 UTCEG score recompute
  66. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  67. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  68. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  69. 2026-07-26 08:05 UTCEG score recompute
  70. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  71. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  72. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  73. 2026-07-23 03:11 UTCEG score recompute
  74. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.3% · 26th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-41148?
CVE-2026-41148 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 prior, in addition to 11.0.0-alpha.1 through 11.12.0 are vulnerable to CSS injection through improper sanitization. The state diagram (and any other diagram type that routes…
When was the CVE record for CVE-2026-41148 published?
The CVE record for CVE-2026-41148 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-2026-41148 actively exploited?
CVE-2026-41148 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-41148?
CVE-2026-41148 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-41148?
A fix for CVE-2026-41148 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-41148 are linked in the Vendor Advisories panel on this page.

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