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CVE-2026-41731: JsonKafkaHeaderMapper and the deprecated DefaultKafkaHeaderMapper matched type headers against trusted package

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This month
HIGH 8.1REMOTEWATCHLISTUPGRADEDOWNGRADEMITIGATE

CVE-2026-41731 is a high-severity flaw (CVSS 8.1) affecting spring for apache kafka, fuse, jboss enterprise application platform expansion pack. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JsonKafkaHeaderMapper and the deprecated DefaultKafkaHeaderMapper matched type headers against trusted packages using a prefix check, meaning that trusting any package implicitly trusted all of its subpackages. Combined with Jackson's default bean deserialization, a producer could supply crafted header values that caused the consumer to deserialize arbitrary JDK types. Affected versions: Spring for Apache Kafka 4.0.0 through 4.0.5; 3.3.0 through

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score8.1 (High)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance0.5% (top 57%)
CISA exploited listNo
WeaknessCWE-502
Published2026-06-10
Last modified2026-08-05
Publisher (CNA): VMware · Vendor: redhat · vmware

Share: LinkedIn · X · Reddit

Last updated 2026-08-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

vmware spring for apache kafka UPGRADE
Affected: >= 2.8.0 and < 2.8.12 · >= 2.9.0 and < 2.9.14 · >= 3.2.0 and < 3.2.14 · >= 3.3.0 and < 3.3.15.1 · >= 4.0.0 and < 4.0.5.1
Fixed in: 2.8.12, 2.9.14, 3.2.14, 3.3.15.1, 4.0.5.1
Safe to downgrade to: a release before 2.8.0
1. Check installed version
apt-cache policy spring-for-apache-kafka || rpm -q spring-for-apache-kafka || spring-for-apache-kafka --version
2. UPGRADE to 2.8.12 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade spring-for-apache-kafka
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade spring-for-apache-kafka
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 2.8.0 (Debian / Ubuntu)
apt-cache madison spring-for-apache-kafka sudo apt install spring-for-apache-kafka=<VERSION_BEFORE_2.8.0> sudo apt-mark hold spring-for-apache-kafka
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list spring-for-apache-kafka sudo dnf downgrade spring-for-apache-kafka-<VERSION_BEFORE_2.8.0> sudo dnf versionlock add spring-for-apache-kafka
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
redhat fuse DOWNGRADE
Affected: 7.0.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.0.0
1. Check installed version
apt-cache policy fuse || rpm -q fuse || fuse --version
2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)
apt-cache madison fuse sudo apt install fuse=<VERSION_BEFORE_7.0.0> sudo apt-mark hold fuse
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list fuse sudo dnf downgrade fuse-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add fuse
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
redhat jboss enterprise application platform expansion pack MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy jboss-enterprise-application-platform-expansion-pack || rpm -q jboss-enterprise-application-platform-expansion-pack || jboss-enterprise-application-platform-expansion-pack --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41731?

spring for apache kafka: upgrade to 2.8.12, 2.9.14, 3.2.14, 3.3.15.1, 4.0.5.1; fuse: downgrade or apply the listed mitigation; jboss enterprise application platform expansion pack: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-41731 being exploited?

CVE-2026-41731 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41731 affect?

CVE-2026-41731 affects spring for apache kafka, fuse, jboss enterprise application platform expansion pack. Severity is high (CVSS 8.1). JsonKafkaHeaderMapper and the deprecated DefaultKafkaHeaderMapper matched type headers against trusted packages using a prefix check, meaning that trusting any package implicitly trusted all of its subpackages. Combined with Jackson's defau

How urgent is CVE-2026-41731?

Priority 49/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

VMware vulnerabilities · Apache Kafka vulnerabilities · JBoss and WildFly vulnerabilities

Related CVEs

References

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