Spring Framework Denial of Service via Unbounded Cache in SpEL

published 2026-06-09 5 mo ago modified 2026-09-10 1 mo ago also GHSA-wxpp-56q6-5pcg , EUVD-2026-35339

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits: 0; none known

Applications which accept user-supplied Spring Expression Language (SpEL) expressions may be vulnerable to a Denial of Service (DoS) attack if the evaluation of a SpEL expression triggers unbounded cache growth.

Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.

Patch / fix

fixed in 2 links 4

maven org.springframework:spring-expression 6.2.19, 7.0.8
Spring Spring Framework 5.3.49, 6.1.28, 6.2.18.1, 7.0.7.1

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-2026-41851 updated 2026-07-17 cvss 5.3

Spring Framework: Spring Framework: Denial of Service via unbounded cache growth in SpEL evaluation

Red Hat OpenShift Developer Tools and Services spring-expression 6.2.14 Red Hat OpenShift Dev Spaces spring-expression 6.2.14
affected: workaround, no fix available “Fix deferred”

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

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 5 mo ago (2026-06-09)

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
maven	org.springframework:spring-expression	>=7.0.0, <7.0.8 >=6.2.0, <6.2.19 >=6.1.0, <=6.1.21 <=5.3.39	7.0.8 6.2.19

Affected products

Spring Spring Framework

Classification

Weakness

CWE-770 Allocation of Resources Without Limits or Throttling

Technology feeds

Spring rss critical rss

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