CVE-2026-66002

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8% (56th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 6.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Frappe is a full-stack web application framework. Prior to 15.115.0 and 16.27.0, the public request-data web form and PersonalDataDownloadRequest class in frappe/website/doctype/personal_data_download_request/personal_data_download_request.py return distinguishable response shapes for registered and unregistered email addresses, including the user_name field and persistence behavior. A remote attacker can compare the responses to enumerate registered users. This issue is fixed in versions 15.115.0 and 16.27.0.

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

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
Severity69% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
0.8%
EPSS %ILE
56th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 20, 2026

Last Modified

September 10, 2026

Advisory Details (9)

Auto-updated Aug 20, 2026
Patch available. Sources: github_pr, github_commit, github_release, github.
github_release Patch Available

v16.27.0

Patch available: frappe/frappe v16.27.0

https://github.com/frappe/frappe/releases/tag/v16.27.0
github_release Patch Available

v15.115.0

Patch available: frappe/frappe v15.115.0

https://github.com/frappe/frappe/releases/tag/v15.115.0
github_commit Patch Available

commit 4b32a4e0072e (frappe/frappe)

Patch available: frappe/frappe v16.27.0 (contains commit 4b32a4e0072e)

https://github.com/frappe/frappe/commit/4b32a4e0072e61ce0abcb0d09cfd1f14724fe896
github_commit

commit 47a396ec59f5 (frappe/frappe)

Fix landed in frappe/frappe commit 47a396ec59f5 — awaiting tagged release

https://github.com/frappe/frappe/commit/47a396ec59f5362029feb349eb2b9d10a21afcf8
github_commit Patch Available

commit 30fe0b4118ff (frappe/frappe)

Patch available: frappe/frappe v15.115.0 (contains commit 30fe0b4118ff)

https://github.com/frappe/frappe/commit/30fe0b4118ff94c95c239dce4bc74ec4ca10a827
github_pr Patch Available

fix(pddr): keep response agnostic (backport #40787)

Patch available: frappe/frappe v16.27.0 (PR #40815 merged 2026-07-14)

https://github.com/frappe/frappe/pull/40815
github_pr Patch Available

fix(pddr): keep response agnostic (backport #40787)

Patch available: frappe/frappe v15.115.0 (PR #40814 merged 2026-07-14)

https://github.com/frappe/frappe/pull/40814
github_pr

fix(pddr): keep response agnostic

Fix merged in frappe/frappe PR #40787 on 2026-07-13 — awaiting tagged release

https://github.com/frappe/frappe/pull/40787
githubMentions a patch (unverified)

User Enumeration via PDDR · Advisory · frappe/frappe · GitHub

https://github.com/frappe/frappe/security/advisories/GHSA-c2xv-c53h-qvr5

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-09 08:23 UTCEG score recompute
  3. 2026-10-08 17:13 UTCEPSS rescore
  4. 2026-10-08 05:18 UTCEG score recompute
  5. 2026-10-07 23:48 UTCEPSS rescore
  6. 2026-10-07 04:08 UTCEG score recompute
  7. 2026-10-06 15:18 UTCEPSS rescore
  8. 2026-10-06 03:20 UTCEG score recompute
  9. 2026-10-05 17:43 UTCEPSS rescore
  10. 2026-10-04 23:22 UTCEPSS rescore
  11. 2026-10-03 16:47 UTCEG score recompute
  12. 2026-10-03 14:26 UTCEPSS rescore
  13. 2026-10-02 17:56 UTCEPSS rescore
  14. 2026-10-02 09:40 UTCEG score recompute
  15. 2026-10-01 19:50 UTCEPSS rescore
  16. 2026-10-01 08:56 UTCEG score recompute
  17. 2026-09-30 15:03 UTCEPSS rescore
  18. 2026-09-30 08:12 UTCEG score recompute
  19. 2026-09-29 04:38 UTCEG score recompute
  20. 2026-09-28 13:51 UTCEPSS rescore
  21. 2026-09-28 03:48 UTCEG score recompute
  22. 2026-09-27 02:59 UTCEG score recompute
  23. 2026-09-26 15:59 UTCEPSS rescore
  24. 2026-09-25 08:44 UTCEG score recompute
  25. 2026-09-24 08:00 UTCEG score recompute
Show 56 more
  1. 2026-09-23 17:54 UTCEPSS rescore
  2. 2026-09-23 07:16 UTCEG score recompute
  3. 2026-09-22 06:32 UTCEG score recompute
  4. 2026-09-21 05:48 UTCEG score recompute
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-20 03:45 UTCEG score recompute
  7. 2026-09-19 03:01 UTCEG score recompute
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 02:17 UTCEG score recompute
  10. 2026-09-17 01:33 UTCEG score recompute
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-16 00:49 UTCEG score recompute
  14. 2026-09-13 23:11 UTCEG score recompute
  15. 2026-09-12 22:27 UTCEG score recompute
  16. 2026-09-11 21:43 UTCEG score recompute
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 09:37 UTCEPSS rescore
  19. 2026-09-10 20:59 UTCEG score recompute
  20. 2026-09-09 01:55 UTCEG score recompute
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-07 16:01 UTCEPSS rescore
  23. 2026-09-07 10:31 UTCEG score recompute
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-06 09:45 UTCEG score recompute
  26. 2026-09-05 15:31 UTCEPSS rescore
  27. 2026-09-05 09:01 UTCEG score recompute
  28. 2026-09-04 08:16 UTCEG score recompute
  29. 2026-09-04 05:07 UTCEPSS rescore
  30. 2026-09-03 07:26 UTCEG score recompute
  31. 2026-09-02 14:12 UTCEPSS rescore
  32. 2026-09-02 06:41 UTCEG score recompute
  33. 2026-09-01 13:54 UTCEPSS rescore
  34. 2026-09-01 05:58 UTCEG score recompute
  35. 2026-09-01 04:40 UTCEPSS rescore
  36. 2026-08-31 05:09 UTCEG score recompute
  37. 2026-08-30 19:17 UTCEPSS rescore
  38. 2026-08-30 04:23 UTCEG score recompute
  39. 2026-08-30 01:22 UTCEPSS rescore
  40. 2026-08-29 03:38 UTCEG score recompute
  41. 2026-08-28 21:42 UTCEPSS rescore
  42. 2026-08-28 02:52 UTCEG score recompute
  43. 2026-08-27 02:06 UTCEG score recompute
  44. 2026-08-26 14:47 UTCEPSS rescore
  45. 2026-08-26 01:22 UTCEG score recompute
  46. 2026-08-25 13:49 UTCEPSS rescore
  47. 2026-08-25 00:38 UTCEG score recompute
  48. 2026-08-23 23:53 UTCEG score recompute
  49. 2026-08-23 00:19 UTCEPSS rescore
  50. 2026-08-22 23:10 UTCEG score recompute
  51. 2026-08-21 23:49 UTCEPSS rescore
  52. 2026-08-21 22:26 UTCEG score recompute
  53. 2026-08-21 21:54 UTCEG score recompute
  54. 2026-08-20 19:18 UTCEG score recompute
  55. 2026-08-20 18:32 UTCEG score recompute
  56. 2026-08-20 18:31 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66002?
CVE-2026-66002 is a medium vulnerability published on August 20, 2026. Frappe is a full-stack web application framework. Prior to 15.115.0 and 16.27.0, the public request-data web form and PersonalDataDownloadRequest class in frappe/website/doctype/personaldatadownloadrequest/personaldatadownloadrequest.py return distinguishable response shapes for registered and…
When was CVE-2026-66002 disclosed?
CVE-2026-66002 was first published on August 20, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66002 actively exploited?
CVE-2026-66002 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-66002?
CVE-2026-66002 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-2026-66002?
A fix for CVE-2026-66002 is available: update to the fixed version the vendor names in its advisory.

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