CVE-2020-10758

Name: CVE-2020-10758
Creator: NVD / NIST
Published: 2020-09-16T16:15:14.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.24%

Last modified Jun 17, 2026

CVE-2020-10758 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability was found in Keycloak before 11.0.1 where DoS attack is possible by sending twenty requests simultaneously to the specified keycloak server, all with a Content-Length header value that exceeds the actual byte count of the request body.. EPSS estimates a 2.24% chance of exploitation in the next 30 days.

Description

A vulnerability was found in Keycloak before 11.0.1 where DoS attack is possible by sending twenty requests simultaneously to the specified keycloak server, all with a Content-Length header value that exceeds the actual byte count of the request body.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.24%

80.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Redhat	Keycloak	< 11.0.1
Redhat	Openshift Application Runtimes	All versions
Redhat	Openshift Application Runtimes	1.0
Redhat	Single Sign-On	All versions
Redhat	Single Sign-On	7.0
Redhat	Single Sign-On	7.4

References

https://bugzilla.redhat.com/show_bug.cgi?id=1843849Issue Tracking, Mitigation, Vendor Advisory
https://github.com/keycloak/keycloak/commit/bee4ca89897766c4b68856eafe14f1a3dad34251Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1843849Issue Tracking, Mitigation, Vendor Advisory
https://github.com/keycloak/keycloak/commit/bee4ca89897766c4b68856eafe14f1a3dad34251Patch, Third Party Advisory

Timeline

Published: Sep 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10758?

How severe is CVE-2020-10758?

CVE-2020-10758 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.24% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10758?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10758?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST