CVE-2022-3782: keycloak: path traversal via double URL encoding

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CRITICAL 9.1REMOTEWATCHLISTDOWNGRADE

CVE-2022-3782 is a critical-severity flaw (CVSS 9.1) affecting keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

keycloak: path traversal via double URL encoding. A flaw was found in Keycloak, where it does not properly validate URLs included in a redirect. An attacker can use this flaw to construct a malicious request to bypass validation and access other URLs and potentially sensitive information within the domain or possibly conduct further attacks. This flaw affects any client that utilizes a wildcard in the Valid Redirect URIs field.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited
Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	6.0% (top 7%)
CISA exploited list	No
Weakness	CWE-22
Published	2023-01-13
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-01-13 06:15 UTCPublished CVE record published
2026-06-17 05:00 UTCUpdated Record last modified

redhat keycloak DOWNGRADE

Affected: 20.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 20.0.2

1. Check installed version

apt-cache policy keycloak || rpm -q keycloak || keycloak --version

2. No fixed release: DOWNGRADE to a release before 20.0.2 (Debian / Ubuntu)

apt-cache madison keycloak sudo apt install keycloak=<VERSION_BEFORE_20.0.2> sudo apt-mark hold keycloak

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list keycloak sudo dnf downgrade keycloak-<VERSION_BEFORE_20.0.2> sudo dnf versionlock add keycloak

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-3782?

keycloak: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-3782 being exploited?

CVE-2022-3782 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-3782 affect?

CVE-2022-3782 affects keycloak. Severity is critical (CVSS 9.1). keycloak: path traversal via double URL encoding. A flaw was found in Keycloak, where it does not properly validate URLs included in a redirect. An attacker can use this flaw to construct a malicious request to bypass validation and access

How urgent is CVE-2022-3782?

Priority 65/100. Critical severity; EPSS top 7%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Keycloak vulnerabilities

Related CVEs

CVE-2023-6927 MEDIUM 4.6 MITIGATE DOWNGRADE A flaw was found in Keycloak
CVE-2023-6563 HIGH 7.7 UPGRADE DOWNGRADE An unconstrained memory consumption vulnerability was discovered in Keycloak
CVE-2023-6291 HIGH 7.1 UPGRADE DOWNGRADE A flaw was found in the redirect_uri validation logic in Keycloak
CVE-2023-6134 MEDIUM 4.6 UPGRADE UPGRADE A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is app
CVE-2025-8419 MEDIUM 5.3 MITIGATE A vulnerability was found in Keycloak-services

References

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