What is CVE-2026-40858?

CVE-2026-40858 is a high-severity vulnerability in Apache Camel, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-04-27.

How severe is CVE-2026-40858?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2026-40858 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Apache Camel

CVE-2026-40858

The camel-infinispan component's ProtoStream-based remote aggregation repository deserializes data read from a remote Infinispan cache using java.io.ObjectInputStream without applying any ObjectInputFilter. An attacker who can write to the…

Vulnerability class: Insecure Deserialization

EPSS: 0.007 (49.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Camel — versions 4.19.0
Apache Software Foundation Camel — versions 4.0.0, 4.15.0, 4.19.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

oscerd/CVE-2026-40858

References

security@apache.org (vendor-advisory, Vendor Advisory)
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0b0ca135-0b70-47e7-9f44-1890c2a1c46c
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Frequently asked questions

What is CVE-2026-40858?: CVE-2026-40858 is a high-severity vulnerability in Apache Camel, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-04-27.
How severe is CVE-2026-40858?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-40858 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.