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Vulnerability record · CVE-2019-17598 · published 5 November 2019

CVE-2019-17598: Lightbend play framework inadequate encryption strength vulnerability

Lightbend · Play Framework

An issue was discovered in Lightbend Play Framework 2.5.x through 2.6.23. When configured to make requests using an authenticated HTTP proxy, play-ws may sometimes, typically under high load, when connecting to a target host using https, expose the proxy credentials to the target host.

7.5 CVSS 3.1 High EPSS 0.70% · top 48.6% CWE-326 · Inadequate encryption strength
7.5CVSS 3.1 base score, v2 4.3
0.70%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Lightbend Play Framework 2.5.x through 2.6.23. When configured to make requests using an authenticated HTTP proxy, play-ws may sometimes, typically under high load, when connecting to a target host using https, expose the proxy credentials to the target host.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.playframework.com/security/vulnerability Release NotesVendor Advisory
https://www.playframework.com/security/vulnerability/CVE-2019-17598-PlayWSHttpConnectAuthorizationHeaders Vendor Advisory
https://www.playframework.com/security/vulnerability Release NotesVendor Advisory
https://www.playframework.com/security/vulnerability/CVE-2019-17598-PlayWSHttpConnectAuthorizationHeaders Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-17598), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.