vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-41726

In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header

MEDIUM
6.5
CVSS Score
Published: June 9, 2026 at 11:48 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
2 products affected across 2 vendorsSpring for Apache KafkaSpring For Apache Kafka

Using Spring for Apache Kafka by Spring?

Get instant alerts when new vulnerabilities affect Spring for Apache Kafka - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

When an application opts into DelegatingDeserializer, a producer can grow the consumer's heap without bound by sending records with unique random spring.kafka.serialization.selector header values, eventually causing GC thrash and OutOfMemoryError. Affected versions: Spring for Apache Kafka 4.0.0 through 4.0.5; 3.3.0 through 3.3.15; 3.2.0 through 3.2.13; 2.9.0 through 2.9.13; 2.8.0 through 2.8.11.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring for Apache Kafka· VMware
95%
v < 2.8.122.9.0 ≤ v < 2.9.143.2.0 ≤ v < 3.2.143.3.0 ≤ v < 3.3.15.14.0.0 ≤ v < 4.0.5.1
Affected range stops below 2.8.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.9.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.15.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.5.1, so it looks safe — our inference, not a vendor statement
Spring For Apache Kafka· Spring
60%
2.8.0 ≤ v < 2.8.122.9.0 ≤ v < 2.9.143.2.0 ≤ v < 3.2.143.3.0 ≤ v < 3.3.15.14.0.0 ≤ v < 4.0.5.12.8.02.9.03.2.03.3.04.0.0
Affected range stops below 2.8.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.9.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.15.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.5.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://spring.io/security/cve-2026-41726

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMvmware
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-770

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card