What is CVE-2023-47640?

CVE-2023-47640 is a medium-severity vulnerability in Datahub-Project Datahub, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 6.4/10. Published 2023-11-14.

How severe is CVE-2023-47640?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Datahub-Project Datahub

CVE-2023-47640

DataHub is an open-source metadata platform. The HMAC signature for DataHub Frontend sessions was being signed using a SHA-1 HMAC with the frontend secret key. SHA1 with a 10 byte key can be brute forced using sufficient resources (i.e. state level actors with large computational capabilities). DataHub Frontend was utilizing the Play LegacyCookiesModule with default settings which utilizes a SHA1 HMAC for signing. This is compounded by using a shorter key length than recommended by default for the signing key for the randomized secret value. An authenticated attacker (or attacker who has otherwise obtained a session token) could crack the signing key for DataHub and obtain escalated privileges by generating a privileged session cookie. Due to key length being a part of the risk, deployments should update to the latest helm chart and rotate their session signing secret. All deployments using the default helm chart configurations for generating the Play secret key used for signing are affected by this vulnerability. Version 0.11.1 resolves this vulnerability. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2023-11-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L.

EPSS exploit prediction

EPSS: 0.004 (27.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Datahub-Project Datahub — versions < 0.11.1
Datahub Project

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

github.com/datahub-project/datahub/security/advisories/GHSA-fg9x-wvqw-6gmw (Third Party Advisory)

Frequently asked questions

What is CVE-2023-47640?: CVE-2023-47640 is a medium-severity vulnerability in Datahub-Project Datahub, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 6.4/10. Published 2023-11-14.
How severe is CVE-2023-47640?: Medium severity. CVSS v3 base score is 6.4 out of 10.