How severe is CVE-2026-41855?

CVE-2026-41855 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-41855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41855?

CVE-2026-41855 affects Vmware Spring Framework. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41855?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-41855 have an EU (EUVD) identifier?

Yes. CVE-2026-41855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35344.

When was CVE-2026-41855 published?

CVE-2026-41855 was published on 2026-06-09 and last updated on 2026-06-29.

CVE-2026-41855

CVE-2026-41855 is a high-severity vulnerability in Vmware Spring Framework with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35344
Weakness: CWE-502
Affected product: Vmware Spring Framework
Published: 2026-06-09
Last modified: 2026-06-29

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.

Frequently asked questions

What is CVE-2026-41855?: 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.
How severe is CVE-2026-41855?: CVE-2026-41855 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-41855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41855?: CVE-2026-41855 affects Vmware Spring Framework. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-41855 have an EU (EUVD) identifier?: Yes. CVE-2026-41855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35344.
When was CVE-2026-41855 published?: CVE-2026-41855 was published on 2026-06-09 and last updated on 2026-06-29.

References

https://spring.io/security/cve-2026-41855

Affected products (1)

cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*

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