CVE-2026-33524

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Source
https://cve.org/CVERecord?id=CVE-2026-33524
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33524.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33524
Aliases
Published
2026-04-24T18:18:02.913Z
Modified
2026-07-08T08:12:48.835540229Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization
Details

Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33524.json",
    "cwe_ids": [
        "CWE-789"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/ndsev/zserio

Affected ranges

Type
GIT
Repo
https://github.com/ndsev/zserio
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c82ea940ec2daae371328bcd9eedd07953b9a7e3
Database specific 
{
    "cpe": "cpe:2.3:a:nds-association:zserio:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.18.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

v1.*
v1.0.0
v1.1.0
v1.2.0
v1.2.0-pre1
v1.3.0
v1.4.0-pre1
v1.4.0-pre2
v2.*
v2.0.0
v2.0.0-pre1
v2.0.0-pre2
v2.0.0-pre3
v2.0.0-pre4
v2.0.0-pre5
v2.1.0
v2.1.0-pre1
v2.1.0-pre2
v2.1.0-pre3
v2.10.0
v2.11.0
v2.12.0
v2.13.0
v2.14.0
v2.14.1
v2.15.0
v2.16.0
v2.16.1
v2.17.0
v2.18.0
v2.2.0
v2.3.0
v2.3.0-pre1
v2.4.0
v2.4.0-pre1
v2.4.0-pre2
v2.4.0-pre3
v2.4.1
v2.4.2
v2.5.0
v2.5.0-pre1
v2.5.1
v2.6.0
v2.6.1
v2.7.0
v2.8.0
v2.9.0
v2.9.0-pre1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33524.json"