CVE-2019-10157
Forced Logout in keycloak-connect
It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.
- Record
CVE-2019-10157- CVSS 3.0
- 4.7 Medium
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-345
- Updated
- 2026-11-02
EUVDEUVD-2019-0509
It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.
- Record
EUVD-2019-0509- CVSS 3.0
- 4.7 Medium
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-68hw-vfh7-xvg8
Forced Logout in keycloak-connect
Versions of keycloak-connect prior to 4.4.0 are vulnerable to Forced Logout. The package fails to validate JWT signatures on the /k_logout route, allowing attackers to logout users and craft malicious JWTs with NBF values that prevent user access indefinitely.
Recommendation
Upgrade to version 4.4.0 or later.
- Record
GHSA-68hw-vfh7-xvg8- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-287, CWE-345
- Updated
- 2026-11-02
NVD
It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.
- Record
CVE-2019-10157- CVSS 3.0
- 4.7 Medium
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-345, CWE-287
- Updated
- 2026-11-02
OSV
It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.
- Record
CVE-2019-10157- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-68hw-vfh7-xvg8
Forced Logout in keycloak-connect
Versions of keycloak-connect prior to 4.4.0 are vulnerable to Forced Logout. The package fails to validate JWT signatures on the /k_logout route, allowing attackers to logout users and craft malicious JWTs with NBF values that prevent user access indefinitely.
Recommendation
Upgrade to version 4.4.0 or later.
- Record
GHSA-68hw-vfh7-xvg8- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-287, CWE-345
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
keycloak-connectnpm |
before 4.8.3 | 4.8.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2019-10157 is a medium vulnerability (CVSS 4.7) in Keycloak, published June 12, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 10th percentile. Fixed in keycloak-connect 4.8.3.
References
bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10157
securityfocus.com/bid/108734
nvd.nist.gov/vuln/detail/CVE-2019-10157
github.com/keycloak/keycloak-nodejs-connect/commit/55e54b55d05ba636bc125a8f3d39f0052d13f8f6
snyk.io/vuln/SNYK-JS-KEYCLOAKNODEJSCONNECT-449920
npmjs.com/advisories/978