keycloak-connect and keycloak-js improperly handle invalid tokens

published 2017-05-12 9 y ago modified 2026-06-17 4 mo ago also GHSA-mw35-24gh-f82w , EUVD-2017-0349

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.5%; EPSS 2.5% chance of exploitation in 30 days, percentile 85%
public exploits: 0; none known

It was found that the Keycloak Node.js adapter 2.5 - 3.0 did not handle invalid tokens correctly. An attacker could use this flaw to bypass authentication and gain access to restricted information, or to possibly conduct further attacks.

Patch / fix

fixed in 2

npm keycloak-connect 3.1.0
npm keycloak-js 3.1.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-7474 updated 2026-05-13 cvss 8.1

keycloak-connect: auth token validity check ignored

Red Hat Single Sign-On 7 keycloak-connect keycloak-connect
affected: no fix available
Red Hat Single Sign-On 7.1
fixed: vendor fix RHSA-2017:1203

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.54% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	keycloak-connect	>=2.5.0, <3.1.0	3.1.0
npm	keycloak-js	>=2.5.0, <3.1.0	3.1.0

Affected products

Red Hat, Inc. Keycloak Node.js adapter

Classification

Weakness

CWE-253 Incorrect Check of Function Return Value

References

rhn.redhat.com /errata/RHSA-2017-1203.html
vendor-advisory, web
bugzilla.redhat.com /show_bug.cgi?id=1445271
web, issue-tracking, third-party-advisory, vdb-entry
nvd.nist.gov /vuln/detail/CVE-2017-7474
advisory

Sources

CVE List CVE-2017-7474
GitHub Advisory GHSA-mw35-24gh-f82w
NVD CVE-2017-7474

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary