CVE-2026-19896Public exploitNetwork attack vector

Authentication bypass via weak session signing key

Published Aug 15, 2026 · Updated Aug 15, 2026

Authentication bypass in Man Group D-Tale 3.0 through 3.22.0 allows remote attackers to forge authenticated Flask session cookies. The build_secret_key function in dtale/app.py generates a 10-character signing key with NumPy's noncryptographic PRNG, permitting offline recovery from a server-issued cookie. Exploitation requires optional authentication to be active and exposes protected datasets without credentials; the published assessment reports no integrity or availability impact.

CVSS severity3.7
Low
EPSS probability0.31%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Man Group D-Tale 3.0 through 3.22.0 allows remote attackers to forge authenticated Flask session cookies. The build_secret_key function in dtale/app.py generates a 10-character signing key with NumPy's noncryptographic PRNG, permitting offline recovery from a server-issued cookie. Exploitation requires optional authentication to be active and exposes protected datasets without credentials; the published assessment reports no integrity or availability impact.

The record

CVE
CVE-2026-19896
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
Man Group
Product
D-Tale
Classifications
CWE-310, CWE-330, T1606.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.0
  2. Affected versionversion=3.1
  3. Affected versionversion=3.10
  4. Affected versionversion=3.11
  5. Affected versionversion=3.12
  6. Affected versionversion=3.13
  7. Affected versionversion=3.14
  8. Affected versionversion=3.15
  9. Affected versionversion=3.16
  10. Affected versionversion=3.17
  11. Affected versionversion=3.18
  12. Affected versionversion=3.19
  13. Affected versionversion=3.2
  14. Affected versionversion=3.20
  15. Affected versionversion=3.21
  16. Affected versionversion=3.22.0
  17. Affected versionversion=3.3
  18. Affected versionversion=3.4
  19. Affected versionversion=3.5
  20. Affected versionversion=3.6
  21. Affected versionversion=3.7
  22. Affected versionversion=3.8
  23. Affected versionversion=3.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Man Group · D-Taleversion=3.0; version=3.1; version=3.10; version=3.11; version=3.12; version=3.13; version=3.14; version=3.15; version=3.16; version=3.17; version=3.18; version=3.19; version=3.2; version=3.20; version=3.21; version=3.22.0; version=3.3; version=3.4; version=3.5; version=3.6; version=3.7; version=3.8; version=3.9

Published CVSS scores

2.6VulDBAV:N/AC:H/Au:N/C:P/I:N/A:N
2.9VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
3.7VulDBCVSS:3.1/AV:N/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-310Cryptographic Issues
CWE-330Use of Insufficiently Random Values
T1606.001Forge Web Credentials: Web Cookies

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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