CVE-2026-7722Public exploitNetwork attack vector

Unauthenticated API access via health-path suffix matching

Published May 4, 2026 · Updated May 4, 2026

Authentication bypass in Prefect 3.6.0 through 3.6.21 allows remote attackers to read protected API data via crafted HTTP requests. The server authentication middleware exempts any GET path ending in health or ready and derives the path from a Host-header-influenced URL. The server must have PREFECT_SERVER_API_AUTH_STRING enabled; exploitation exposes protected API responses without credentials but grants no reported write access or service interruption.

CVSS severity5.3
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Prefect 3.6.0 through 3.6.21 allows remote attackers to read protected API data via crafted HTTP requests. The server authentication middleware exempts any GET path ending in health or ready and derives the path from a Host-header-influenced URL. The server must have PREFECT_SERVER_API_AUTH_STRING enabled; exploitation exposes protected API responses without credentials but grants no reported write access or service interruption.

The record

CVE
CVE-2026-7722
Published
May 4, 2026
Updated
May 4, 2026
Vendor
Prefect Technologies, Inc.
Product
Prefect
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.6.0
  2. Affected versionversion=3.6.1
  3. Affected versionversion=3.6.10
  4. Affected versionversion=3.6.11
  5. Affected versionversion=3.6.12
  6. Affected versionversion=3.6.13
  7. Affected versionversion=3.6.14
  8. Affected versionversion=3.6.15
  9. Affected versionversion=3.6.16
  10. Affected versionversion=3.6.17
  11. Affected versionversion=3.6.18
  12. Affected versionversion=3.6.19
  13. Affected versionversion=3.6.2
  14. Affected versionversion=3.6.20
  15. Affected versionversion=3.6.21
  16. Affected versionversion=3.6.3
  17. Affected versionversion=3.6.4
  18. Affected versionversion=3.6.5
  19. Affected versionversion=3.6.6
  20. Affected versionversion=3.6.7
  21. Affected versionversion=3.6.8
  22. Affected versionversion=3.6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Prefect Technologies, Inc. · Prefectversion=3.6.0; version=3.6.1; version=3.6.10; version=3.6.11; version=3.6.12; version=3.6.13; version=3.6.14; version=3.6.15; version=3.6.16; version=3.6.17; version=3.6.18; version=3.6.19; version=3.6.2; version=3.6.20; version=3.6.21; version=3.6.3; version=3.6.4; version=3.6.5; version=3.6.6; version=3.6.7; version=3.6.8; version=3.6.9

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
5.0VulDBAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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