`CVE-2026-43865`

8.1 High Protected by RASP

Published 2 months ago. NVD backfills CPE data for days or weeks after publication, and OSV and the exploit indexes lag too. Scope and status here may change.

Description

Deserialization of Untrusted Data vulnerability in Apache Camel Hazelcast component. The camel-hazelcast component creates and manages Hazelcast instances using a default configuration that applies no Java deserialization filter. When Camel builds the Hazelcast Config itself - that is, when no user-supplied HazelcastInstance, hazelcastConfigUri, or referenced Config bean is provided - neither Hazelcast's JavaSerializationFilterConfig nor a Camel-side ObjectInputFilter is configured, so objects received over the Hazelcast cluster protocol are deserialized inside Hazelcast's own serialization layer (ObjectInputStream.readObject) before Camel ever processes them. An attacker who can join or otherwise reach the Hazelcast cluster can publish a crafted serialized Java object that is then deserialized on every Camel node, resulting in remote code execution. The exposure is present by default and requires no opt-in endpoint configuration: any route using a hazelcast consumer (hazelcast-topic, hazelcast-queue, hazelcast-seda, hazelcast-map, hazelcast-multimap, hazelcast-replicatedmap, hazelcast-list, hazelcast-set), as well as the HazelcastAggregationRepository and HazelcastIdempotentRepository, is affected whenever the managed instance is created from Camel's default configuration. This issue affects Apache Camel: from 4.0.0 before 4.14.8, from 4.15.0 before 4.18.3, from 4.19.0 before 4.21.0. Users are recommended to upgrade to version 4.21.0, which fixes the issue. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.8. If users are on the 4.18.x releases stream, then they are suggested to upgrade to 4.18.3. The fix makes Camel apply a default Hazelcast JavaSerializationFilterConfig (whitelisting the java., javax. and org.apache.camel. class-name prefixes and blacklisting java.net.) to instances it creates from its own default configuration, while leaving any user-supplied Config or HazelcastInstance untouched. For deployments that cannot upgrade immediately, configure a deserialization filter on the Hazelcast instance (Hazelcast JavaSerializationFilterConfig, or the JVM-wide system property -Djdk.serialFilter=!java.net.**;java.**;javax.**;org.apache.camel.**;!*) and enable Hazelcast cluster authentication and TLS to restrict who can reach the cluster.

CWE-502 · Deserialization of untrusted data

Exploitation Status

No public exploit

Nothing published shows this CVE being exploited. The 1 repository below are public repositories under the 5-star bar: published, but with nobody other than their authors having looked.

CVSS E:U

CISA KEV not listed
CISA Vulnrichment exploitation: none
Indexed PoC 1 indexed Published artifacts you can open, in GitHub PoC; first seen 2026-07-12.
EPSS 0.98% chance in 30 days

1 of these are GitHub repositories below the 5★ evidence bar. They are listed because a person may still want to open one; they do not count toward the exploit maturity above.

Index	Artifact	Stars	First seen
GitHub PoC	Reproducer for CVE-2026-43865 — Apache Camel camel-hazelcast default-configured instance unsafe Java deserialization (RCE)		2026-07-12

Index

Artifact

Stars

First seen

GitHub PoC

Reproducer for CVE-2026-43865 — Apache Camel camel-hazelcast default-configured instance unsafe Java deserialization (RCE)

2026-07-12

Waratek Defense Posture

Protected by RASP

A Waratek agent blocks this today.

Applicable rule: Promoted to MITIGATED-BY-RASP (security rule): this CVE's weakness (CWE-502: Deserialization of Untrusted Data) can be mitigated by an ARMR deserialization security rule that blocks this class of attack at the JVM level, without requiring a CVE-specific patch.

Protection full a general security rule for the vulnerability class
Action available security rule
Review automated inferred
Record active

Decided by secure-rule-match : A vulnerability class already blocked by an ARMR security rule

Finding Promoted to MITIGATED-BY-RASP (security rule): this CVE's weakness (CWE-502: Deserialization of Untrusted Data) can be mitigated by an ARMR deserialization security rule that blocks this class of attack at the JVM level, without requiring a CVE-specific patch.

Decided by	`secure-rule-match` : A vulnerability class already blocked by an ARMR security rule
Finding	Promoted to MITIGATED-BY-RASP (security rule): this CVE's weakness (CWE-502: Deserialization of Untrusted Data) can be mitigated by an ARMR deserialization security rule that blocks this class of attack at the JVM level, without requiring a CVE-specific patch.

CVSS

8.1 HIGH v3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 1 metric

VRT selects the newest version's highest entry and publishes it as cvssScore, newest rather than largest because scores are not comparable across versions, and highest rather than first because the first entry is frequently a CNA placeholder scoring 0.0 over NVD's own analysis.

Version Score Band Vector Assigner Type

CVSS 3.1 8.1 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CISA-ADP Secondary published

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	8.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`	CISA-ADP	Secondary	published

Affected Software & Releases

☕ Maven Library Packages

Artifact coordinates and fix boundaries from OSV.dev

Package Coordinate Introduced Fixed Last affected

org.apache.camel:camel-hazelcast 4.0.0 4.14.8 unbounded

org.apache.camel:camel-hazelcast 4.15.0 4.18.3 unbounded

org.apache.camel:camel-hazelcast 4.19.0 4.21.0 unbounded

Package Coordinate	Introduced	Fixed	Last affected
`org.apache.camel:camel-hazelcast`	4.0.0	`4.14.8`	unbounded
`org.apache.camel:camel-hazelcast`	4.15.0	`4.18.3`	unbounded
`org.apache.camel:camel-hazelcast`	4.19.0	`4.21.0`	unbounded

🖥️ Product CPEs & Version Ranges

2 product(s) over 6 version claims (uncapped)

Source	Vendor	Product	Scheme	Affected Versions
nvd	apache	camel	generic	≥ 4.0.0 and ＜ 4.14.8 · ≥ 4.15.0 and ＜ 4.18.3 · ≥ 4.19.0 and ＜ 4.21.0
osv	org.apache.camel	camel-hazelcast	generic	≥ 4.0.0 and ＜ 4.14.8 · ≥ 4.15.0 and ＜ 4.18.3 · ≥ 4.19.0 and ＜ 4.21.0

Source

Vendor

Product

Scheme

Affected Versions

nvd

apache

camel

generic

≥ 4.0.0 and ＜ 4.14.8 · ≥ 4.15.0 and ＜ 4.18.3 · ≥ 4.19.0 and ＜ 4.21.0

osv

org.apache.camel

camel-hazelcast

generic

≥ 4.0.0 and ＜ 4.14.8 · ≥ 4.15.0 and ＜ 4.18.3 · ≥ 4.19.0 and ＜ 4.21.0

References

URL	Tags
https://github.com/apache/camel/pull/22943	WEB
https://github.com/apache/camel/pull/22946	WEB
https://github.com/apache/camel/pull/22955	WEB
https://github.com/apache/camel/commit/5caf4368551f6d3b61690d5db03869491390d446	WEB
https://github.com/apache/camel/commit/7a309042f22493082647a410d9d8cafd672b1c74	WEB
https://github.com/apache/camel/commit/974a11b5ed5e2d50722f33aa48f61898395ea45b	WEB
https://camel.apache.org/security/CVE-2026-43865.html	WEB
https://github.com/apache/camel	PACKAGE
https://github.com/apache/camel/releases/tag/camel-4.14.8	WEB
https://github.com/apache/camel/releases/tag/camel-4.18.3	WEB

URL

Timeline

Published 2026-07-06 Last modified 2026-07-07

Published	2026-07-06	By the CVE Program.
NVD record modified	2026-07-07	NVD's own last-modified date for this record.

Published

2026-07-06

By the CVE Program.

NVD record modified

2026-07-07

NVD's own last-modified date for this record.

Pipeline policy audit (15 of 21 rules evaluated)

15 of 21 rules ran. The rest were never reached, because an earlier stage settled the CVE, a distinct claim from a rule that ran and found nothing.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? first match wins

1 rejected no-match CVE Program withdrawal of this identifier

scope: Is the vulnerability ARMR's to address? first match wins

2 armr-patch-file no-match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no-match An ARMR security-rule template on disk for this CVE

4 manual-classification no-match A researcher's recorded decision for this specific CVE

5 manual classification no-match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no-match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no-match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the native WebLogic proxy plug-in. Oracle gives these no CPE of their own and names them only in the description.

8 osv-maven matched Queued for review Maven packages: org.apache.camel:camel-hazelcast

9 cna-maven-package not-reached An affected Maven artifact named by the CNA itself

10 known-cpe-product not-reached An NVD CPE naming a product ARMR tracks

11 cna-cpe-product not-reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

12 oracle-advisory-family not-reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

13 non-deployable-product not-reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

14 unmatched-product not-reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? cumulative: every rule gets a turn

15 patch-hint no-match A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

16 open-source-maven matched Mitigation candidate Open-source Maven artifact indexed by OSV (Maven packages: org.apache.camel:camel-hazelcast). The source is public, which makes an ARMR patch rule a candidate; nothing here establishes that one can be written.

17 poc-derivable skipped An indexed exploit to reverse-engineer, where there is no source to read

18 no-exploit skipped With no fix path, a public exploit, or a CISA record of one

19 secure-rule-match decided it matched Protected by RASP CWE-502 (Deserialization of Untrusted Data) is mitigable by an ARMR deserialization security rule.

20 below-action-threshold skipped Medium or Low severity, no KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

21 no-exploit-published skipped A published working exploit for this candidate, not only a proof of concept, a forecast, or nothing at all

What the scope rules read

The products the record named, and whether known-products.yaml tracks them. This is the evidence the scope stage decided on.

Vendor Product Tracked CPE Source

apache camel tracked cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:* yaml

Raw stored JSON document for this CVE ↗ · NVD ↗ · CVE.org ↗