CVE-2024-22258: PKCE Downgrade in Spring Authorization Server

published 2024-03-20 2 y ago modified 2026-06-17 4 mo ago also GHSA-x637-x8p3-5p22 , EUVD-2024-1035

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

Spring Authorization Server versions 1.0.0 - 1.0.5, 1.1.0 - 1.1.5, 1.2.0 - 1.2.2 and older unsupported versions are susceptible to a PKCE Downgrade Attack for Confidential Clients.

Specifically, an application is vulnerable when a Confidential Client uses PKCE for the Authorization Code Grant.

An application is not vulnerable when a Public Client uses PKCE for the Authorization Code Grant.

Patch / fix

fixed in 2 links 1

maven org.springframework.security:spring-security-oauth2-authorization-server 1.1.6, 1.2.3
Spring Spring 1.0.6, 1.1.6, 1.2.3

github.com/spring-projects/spring-authorization-server@a7035d2 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-08-02)

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	org.springframework.security:spring-security-oauth2-authorization-server	<1.1.6 >=1.2.0, <1.2.3	1.1.6 1.2.3

Affected products

Spring Spring

Classification

Weakness

CWE-470 Use of Externally-Controlled Input to Select Classes or Code
CWE-287 Improper Authentication

References

Sources

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