9.8

CVE-2026-41855: spring spring framework Deserialization of Untrusted Data

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-41855DEBIAN-CVE-2026-41855CGA-3j96-h4v9-wwvc
Published 09-06-2026Last modified 27-06-2026
Open JSON

Vulnerability summary

CVE-2026-41855 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in spring spring framework. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.48%
0%100%
Low · +0.19 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-06-2026
    PublishedVulnerability first disclosed.
  2. 27-06-2026
    Last modifiedVulnerability information updated.

Description

In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which can lead to unauthorized actions via gadget class deserialization. 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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

+0.19 pp

From 0.29% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • apache-activemq-5.19All versions (No fix recorded)
  • apache-activemq-fips-5.19All versions (No fix recorded)
Debian1 product
  • libspring-javaAll versions (No fix recorded)
Org.springframework1 product
  • spring-jms≤ 5.3.39 | ≥ 6.0.0, ≤ 6.1.21 | ≥ 6.2.0, < 6.2.19 | ≥ 7.0.0-M1, < 7.0.8
Spring1 product
  • spring framework≥ 7.0.0, < 7.0.7.1 | ≥ 6.2.0, < 6.2.18.1 | ≥ 6.1.0, < 6.1.28 | ≥ 5.3.0, < 5.3.49
Ubuntu1 product
  • libspring-javaAll versions (No fix recorded)
Vmware1 product
  • spring_framework≥ 5.3.0, < 5.3.49 | ≥ 6.1.0, < 6.1.28 | ≥ 6.2.0, < 6.2.18.1 | ≥ 7.0.0, < 7.0.7.1

6 vendors · 7 products

References

7 links