CVE-2026-81827

MEDIUMPre-NVD 6.96.9
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (35th 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
6.9EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.9Exploit: 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 incorrectly attempted to validate login email addresses by calling Email(email). That does not perform WTForms field validation; it merely constructs a validator object.

Consequently, malformed attacker-controlled email input could continue through the login process and be written to security-relevant logs. The vulnerable code inserted the supplied email into both a warning log and the custom audit logger. Since CR/LF characters were not escaped, an unauthenticated attacker could potentially inject additional physical log lines or forge misleading log entries.

The patch corrects the validation call to Email()(form, form.email), changes the standard logging call to parameterized logging, and introduces _sanitize_log_fragment() so carriage returns and line feeds are encoded instead of creating new records.

Version impacted >=3.3.0

CVSS v3
6.9
EG Score
6.9MEDIUMmedium confidence
EG Risk
46
EG Risk 46/100

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)
Severity69% × 45%
The EG Score, 6.9 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

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 at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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 660b4cc40505 (flowintel/flowintel)

Fix landed in flowintel/flowintel commit 660b4cc40505 — awaiting tagged release

https://github.com/flowintel/flowintel/commit/660b4cc405055a794f157d3e4612520f12fe65bf

Vendor Advisories for CVE-2026-81827(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 / 75× 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 120 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 22 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 0.4% · 35th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 35th 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 0.4% · 35th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-10-10 09:48 UTCEG score recompute
  10. 2026-10-10 09:48 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  12. 2026-10-09 07:23 UTCEG score recompute
  13. 2026-10-09 07:23 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-10-08 05:13 UTCEG score recompute
  16. 2026-10-08 05:13 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-07 03:03 UTCEG score recompute
  19. 2026-10-07 03:03 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-10-06 00:54 UTCEG score recompute
  22. 2026-10-06 00:54 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-10-04 19:39 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
Show 73 more
  1. 2026-10-03 15:14 UTCEG score recompute
  2. 2026-10-03 15:14 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-10-02 09:23 UTCEG score recompute
  6. 2026-10-02 09:23 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  7. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-10-01 07:14 UTCEG score recompute
  9. 2026-10-01 07:14 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  10. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-09-30 05:05 UTCEG score recompute
  12. 2026-09-30 05:04 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  13. 2026-09-28 23:13 UTCEG score recompute
  14. 2026-09-28 23:13 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  15. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-09-27 20:55 UTCEG score recompute
  17. 2026-09-27 20:55 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-09-26 18:46 UTCEG score recompute
  20. 2026-09-26 18:46 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  21. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-09-25 12:02 UTCEG score recompute
  23. 2026-09-25 12:02 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  24. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-09-24 09:52 UTCEG score recompute
  26. 2026-09-24 09:52 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  27. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  28. 2026-09-23 07:43 UTCEG score recompute
  29. 2026-09-23 07:43 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  30. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  31. 2026-09-22 05:32 UTCEG score recompute
  32. 2026-09-22 05:32 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  33. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  34. 2026-09-21 03:23 UTCEG score recompute
  35. 2026-09-21 03:23 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  36. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  37. 2026-09-20 01:13 UTCEG score recompute
  38. 2026-09-20 01:13 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  39. 2026-09-18 23:04 UTCEG score recompute
  40. 2026-09-18 23:04 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  41. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  42. 2026-09-17 20:55 UTCEG score recompute
  43. 2026-09-17 20:55 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  44. 2026-09-16 15:47 UTCEG score recompute
  45. 2026-09-16 15:47 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  46. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  47. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  48. 2026-09-15 13:38 UTCEG score recompute
  49. 2026-09-15 13:38 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  50. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  51. 2026-09-14 11:29 UTCEG score recompute
  52. 2026-09-14 11:29 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  53. 2026-09-13 09:20 UTCEG score recompute
  54. 2026-09-13 09:20 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  55. 2026-09-12 07:10 UTCEG score recompute
  56. 2026-09-12 07:10 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  57. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  58. 2026-09-11 05:01 UTCEG score recompute
  59. 2026-09-11 05:01 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  60. 2026-09-10 02:51 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  61. 2026-09-09 00:42 UTCEG score recompute
  62. 2026-09-09 00:41 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  63. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  64. 2026-09-07 11:25 UTCEG score recompute
  65. 2026-09-07 11:25 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  66. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  67. 2026-09-06 09:16 UTCEG score recompute
  68. 2026-09-06 09:16 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  69. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  70. 2026-09-05 07:02 UTCEG score recompute
  71. 2026-09-05 07:02 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf
  72. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  73. 2026-09-04 04:52 UTCGHSA enrichmentGHSA-3hq8-r684-4qwf

Frequently asked(5)

What is CVE-2026-81827?
CVE-2026-81827 is a medium-severity vulnerability; its CVE record was published on August 27, 2026. Affected versions of Flowintel incorrectly attempted to validate login email addresses by calling Email(email). That does not perform WTForms field validation; it merely constructs a validator object. Consequently, malformed attacker-controlled email input could continue through the login process…
When was the CVE record for CVE-2026-81827 published?
The CVE record for CVE-2026-81827 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-2026-81827 actively exploited?
CVE-2026-81827 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81827?
CVE-2026-81827 has a CVSS base score of 6.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-81827?
An upstream fix for CVE-2026-81827 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-2026-81827 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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