CVE-2020-10758

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.

Published: 2020-09-16 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-10758 is rated Moderate Risk (59.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.24%). EPSS rose +1.71% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-10758

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.53% 2.24% +1.71%
2 2025-11-21 0.41% 0.53% +0.12%
3 2025-11-18 — 0.41% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-10758

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-10758

GitHub Security Advisory for CVE-2020-10758

GHSA-52rg-hpwq-qp56 · Severity: high · Ecosystem: maven — Allocation of Resources Without Limits or Throttling in Keycloak

OS Trackers for CVE-2020-10758

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2020-10758

Affected software / configurations for CVE-2020-10758

Vendor Product Version Raw CPE
redhat keycloak < 11.0.1 cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*
redhat openshift_application_runtimes — cpe:2.3:a:redhat:openshift_application_runtimes:-:*:*:*:text-only:*:*:*
redhat openshift_application_runtimes 1.0 cpe:2.3:a:redhat:openshift_application_runtimes:1.0:*:*:*:*:*:*:*
redhat single_sign-on — cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
redhat single_sign-on 7.0 cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
redhat single_sign-on 7.4 cpe:2.3:a:redhat:single_sign-on:7.4:*:*:*:*:*:*:*

References for CVE-2020-10758

cvelogic Threat Intelligence