CVE-2026-81753

MEDIUMPre-NVD 5.15.1
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (44th 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
Trending — 3 sources updated this week
5.1EG
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: 0.5%CVSS: 5.1Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Affected versions of Flowintel render Mermaid blocks contained in stored case notes without sufficiently neutralizing attacker-controlled markup. Because Mermaid note content is persisted and later rendered for other users, an attacker with permission to create or edit a note could store a crafted Mermaid payload that results in JavaScript execution when another user views the affected case note.

The patch adds explicit Mermaid detection and HTML escaping around the token content before the generated Mermaid wrapper is returned. It also moves the wrapping logic earlier in page initialization so Markdown instances are protected consistently.

Version impacted >= 3.3.0

CVSS v3
5.1
EG Score
5.1MEDIUMmedium confidence
EG Risk
23
EG Risk 23/100

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)
Severity51% × 45%
The EG Score, 5.1 of 10.
Exploitation0.5% × 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: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

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

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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

August 27, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 27, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
GitHub commit

commit 61c97e67f5d0 (flowintel/flowintel)

Fix landed in flowintel/flowintel commit 61c97e67f5d0 — awaiting tagged release

https://github.com/flowintel/flowintel/commit/61c97e67f5d04030f26e7900c470b52f9f37da06

Vendor Advisories for CVE-2026-81753(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 17× in last 7d / 79× 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 98 of 130 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 32 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-12 14:56 UTCEG score recompute
  4. 2026-10-11 19:20 UTCEG score recompute
  5. 2026-10-11 16:36 UTCEG score recompute
  6. 2026-10-11 13:54 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-10-10 05:20 UTCEG score recompute
  10. 2026-10-10 05:20 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-10-09 03:09 UTCEG score recompute
  13. 2026-10-09 03:08 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  15. 2026-10-08 01:21 UTCEG score recompute
  16. 2026-10-08 01:21 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  18. 2026-10-07 00:11 UTCEG score recompute
  19. 2026-10-07 00:11 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-10-06 00:54 UTCEG score recompute
  22. 2026-10-06 00:54 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-10-05 01:34 UTCEG score recompute
  25. 2026-10-05 01:34 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
Show 73 more
  1. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-10-04 02:16 UTCEG score recompute
  3. 2026-10-04 02:16 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  4. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-03 02:59 UTCEG score recompute
  6. 2026-10-03 02:59 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  7. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-10-02 03:42 UTCEG score recompute
  9. 2026-10-02 03:42 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  10. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-01 04:25 UTCEG score recompute
  12. 2026-10-01 04:25 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  13. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-09-30 05:05 UTCEG score recompute
  15. 2026-09-30 05:05 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  16. 2026-09-28 21:17 UTCEG score recompute
  17. 2026-09-28 21:17 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  18. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-09-27 18:05 UTCEG score recompute
  20. 2026-09-27 18:04 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-09-26 18:47 UTCEG score recompute
  23. 2026-09-26 18:47 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-09-24 20:30 UTCEG score recompute
  26. 2026-09-24 20:30 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  27. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  28. 2026-09-23 21:13 UTCEG score recompute
  29. 2026-09-23 21:13 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  30. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  31. 2026-09-22 21:56 UTCEG score recompute
  32. 2026-09-22 21:56 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  33. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  34. 2026-09-21 22:40 UTCEG score recompute
  35. 2026-09-21 22:39 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  36. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  37. 2026-09-20 23:22 UTCEG score recompute
  38. 2026-09-20 23:22 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  39. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  40. 2026-09-19 23:48 UTCEG score recompute
  41. 2026-09-19 23:48 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  42. 2026-09-19 00:31 UTCEG score recompute
  43. 2026-09-19 00:31 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  44. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  45. 2026-09-18 01:13 UTCEG score recompute
  46. 2026-09-18 01:13 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  47. 2026-09-17 01:56 UTCEG score recompute
  48. 2026-09-17 01:56 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  49. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  50. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  51. 2026-09-16 02:39 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  52. 2026-09-15 03:21 UTCEG score recompute
  53. 2026-09-15 03:21 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  54. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  55. 2026-09-14 04:04 UTCEG score recompute
  56. 2026-09-14 04:04 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  57. 2026-09-13 04:48 UTCEG score recompute
  58. 2026-09-13 04:48 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  59. 2026-09-12 05:31 UTCEG score recompute
  60. 2026-09-12 05:31 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  61. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  62. 2026-09-11 06:14 UTCEG score recompute
  63. 2026-09-11 06:14 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  64. 2026-09-10 06:57 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  65. 2026-09-09 07:39 UTCEG score recompute
  66. 2026-09-09 07:39 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  67. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  68. 2026-09-08 08:23 UTCEG score recompute
  69. 2026-09-08 08:22 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  70. 2026-09-07 09:04 UTCEG score recompute
  71. 2026-09-07 09:04 UTCGHSA enrichmentGHSA-4xww-rqhr-67w2
  72. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  73. 2026-09-06 09:42 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-81753?
CVE-2026-81753 is a medium-severity vulnerability; its CVE record was published on August 27, 2026. Affected versions of Flowintel render Mermaid blocks contained in stored case notes without sufficiently neutralizing attacker-controlled markup. Because Mermaid note content is persisted and later rendered for other users, an attacker with permission to create or edit a note could store a crafted…
When was the CVE record for CVE-2026-81753 published?
The CVE record for CVE-2026-81753 was published on August 27, 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 August 28, 2026; the record at its source may have been updated since.
Is CVE-2026-81753 actively exploited?
CVE-2026-81753 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81753?
CVE-2026-81753 has a CVSS base score of 5.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-81753?
An upstream fix for CVE-2026-81753 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-81753 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-81753

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