CVE-2020-10758
Allocation of Resources Without Limits or Throttling in Keycloak
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-10758- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-770
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-10758- Updated
- 2026-11-02
EUVDEUVD-2022-0825 No score
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.
- Record
EUVD-2022-0825- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-52rg-hpwq-qp56
Allocation of Resources Without Limits or Throttling in Keycloak
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.
- Record
GHSA-52rg-hpwq-qp56- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-770
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2020-10758- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-52rg-hpwq-qp56
Allocation of Resources Without Limits or Throttling in Keycloak
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.
- Record
GHSA-52rg-hpwq-qp56- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-770
- Updated
- 2026-11-02
OSVRHSA-2020:3495
Red Hat Security Advisory: Red Hat Single Sign-On 7.4.2 security update on RHEL 6
- Record
RHSA-2020:3495- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVRHSA-2020:3496
Red Hat Security Advisory: Red Hat Single Sign-On 7.4.2 security update on RHEL 7
- Record
RHSA-2020:3496- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVRHSA-2020:3497
Red Hat Security Advisory: Red Hat Single Sign-On 7.4.2 security update on RHEL 8
- Record
RHSA-2020:3497- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.keycloak:keycloak-parentMaven |
before 11.0.1 | 11.0.1 |
org.keycloak:keycloak-parentMaven |
before 11.0.1, plus listed versions 1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4 Show 45 moreShow less1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final |
11.0.1 |
rh-sso7-keycloakRed Hat:red_hat_single_sign_on:7::el6 From an advisory covering 2 CVEs |
before 0:9.0.5-1.redhat_00001.1.el6sso | 0:9.0.5-1.redhat_00001.1.el6sso |
rh-sso7-keycloak-serverRed Hat:red_hat_single_sign_on:7::el6 From an advisory covering 2 CVEs |
before 0:9.0.5-1.redhat_00001.1.el6sso | 0:9.0.5-1.redhat_00001.1.el6sso |
rh-sso7-keycloakRed Hat:red_hat_single_sign_on:7::el7 From an advisory covering 2 CVEs |
before 0:9.0.5-1.redhat_00001.1.el7sso | 0:9.0.5-1.redhat_00001.1.el7sso |
rh-sso7-keycloak-serverRed Hat:red_hat_single_sign_on:7::el7 From an advisory covering 2 CVEs |
before 0:9.0.5-1.redhat_00001.1.el7sso | 0:9.0.5-1.redhat_00001.1.el7sso |
rh-sso7-keycloakRed Hat:red_hat_single_sign_on:7::el8 From an advisory covering 2 CVEs |
before 0:9.0.5-1.redhat_00001.1.el8sso | 0:9.0.5-1.redhat_00001.1.el8sso |
rh-sso7-keycloak-serverRed Hat:red_hat_single_sign_on:7::el8 From an advisory covering 2 CVEs |
before 0:9.0.5-1.redhat_00001.1.el8sso | 0:9.0.5-1.redhat_00001.1.el8sso |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-10758 is a high vulnerability (CVSS 7.5) in Keycloak, published September 16, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.95%, the 80th percentile. Fixed in org.keycloak:keycloak-parent 11.0.1.
References
bugzilla.redhat.com/show_bug.cgi?id=1843849
github.com/keycloak/keycloak/commit/bee4ca89897766c4b68856eafe14f1a3dad34251
nvd.nist.gov/vuln/detail/CVE-2020-10758
access.redhat.com/errata/RHSA-2020:3495
Show 11 moreShow less
security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_3495.json
cve.org/CVERecord?id=CVE-2020-1728
Left out here: 64 versions. The JSON record has them.