Medium
In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-41726
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 10:46 UTC · Revision 1
Source evidence
In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header
core-osv · Original sourcePublished 9 Jun 2026, 23:48 UTC
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.
osv:CVE-2026-41726
Complete source record
{
"id": "db73a9b4eae8d9b297baffda7552c74b5a4d2f4704f8aaf58e5db126010cbd72",
"url": "https://osv.dev/vulnerability/CVE-2026-41726",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header",
"summary": "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.",
"evidence": "osv:CVE-2026-41726",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-41726",
"aliases": [
"CVE-2026-41726",
"GHSA-xvfq-4q6q-gxx7"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/spring-projects/spring-kafka",
"type": "GIT",
"events": [
{
"introduced": "f1b207daac91ddc880c0883ec759809464c78700"
},
{
"last_affected": "4fef8fb7a43d18042468233e8aea1ab34f5c842f"
},
{
"introduced": "a9001bf4c2cae68ad5d58c65d4d588922fec00f6"
},
{
"last_affected": "5572a82b1a6c931d9a1656cadf8ba3df59102492"
},
{
"introduced": "1d8378bff7169aa7c111857c1dab0c6f8c330e3f"
},
{
"last_affected": "9f3fefff292c25c972ffbc7122a30c776e37e018"
},
{
"introduced": "fb5b3ea1976cbd7846d5df555fa5e687b68364d9"
},
{
"last_affected": "d3b3f85a3cf6571e4b2f4b64641e281050459ca7"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "4.0.0"
},
{
"last_affected": "4.0.5"
}
],
"source": "DESCRIPTION"
},
{
"range": [
{
"introduced": "3.3.0"
},
{
"last_affected": "3.3.15"
}
],
"source": "DESCRIPTION"
},
{
"range": [
{
"introduced": "2.9.0"
},
{
"last_affected": "2.9.13"
}
],
"source": "DESCRIPTION"
},
{
"range": [
{
"introduced": "2.8.0"
},
{
"last_affected": "2.8.11"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
"v3.3.15",
"v4.0.5",
"v4.0.4",
"v3.3.14",
"v4.0.3",
"v3.3.13",
"v4.0.2",
"v3.3.12",
"v4.0.1",
"v4.0.0",
"v3.3.11",
"v3.3.10",
"v3.3.9",
"v3.3.8",
"v3.3.7",
"v3.3.6",
"v3.3.5",
"v3.3.4",
"v3.3.3",
"v3.3.2",
"v3.3.1",
"v3.3.0",
"v2.9.13",
"v2.9.12",
"v2.9.11",
"v2.9.10",
"v2.9.9",
"v2.9.8",
"v2.9.7",
"v2.9.6",
"v2.9.5",
"v2.9.4",
"v2.9.3",
"v2.8.11",
"v2.9.2",
"v2.8.10",
"v2.9.1",
"v2.8.9",
"v2.9.0",
"v2.8.8",
"v2.8.7",
"v2.8.6",
"v2.8.5",
"v2.8.4",
"v2.8.3",
"v2.8.2",
"v2.8.1",
"v2.8.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41726.json"
}
}
],
"modified": "2026-10-28T02:30:50.466307859Z",
"provider": "osv",
"references": [
"https://spring.io/security/cve-2026-41726",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41726.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-41726"
],
"provider_metadata": {
"cwe_ids": [
"CWE-770"
],
"cna_assigner": "vmware",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.5.1"
},
{
"introduced": "3.3.0"
},
{
"fixed": "3.3.15.1"
},
{
"introduced": "3.2.0"
},
{
"fixed": "3.2.14"
},
{
"introduced": "2.9.0"
},
{
"fixed": "2.9.14"
},
{
"introduced": "2.8.0"
},
{
"fixed": "2.8.12"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41726.json"
}
},
"related_cves": [
{
"value": "CVE-2026-41726",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519043,
"published_at": "2026-06-09T23:48:51.048+00:00"
}