CVE-2026-33524

FAUCET Score

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.

First published: Apr 24, 2026Last modified: Apr 27, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2.18.1CPE matchmatch criteria	cpe:2.3:a:nds-association:zserio::::::::

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.32%

Probability of exploitation in next 30 days

EPSS Percentile

24.4%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0032 is in the 6th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

mavenpatch availablevia ghsa

Product: io.github.ndsev:zserio-runtimeFixed in: 2.18.1

github_advisoryworkaround availablevia nvd_reference

View patch

Vendor Advisories (1)

mavenGHSA-cwq5-8pvq-j65jhigh

Zserio Runtime: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization

Apr 24, 2026

References

github.com / ndsev/zserio/security/advisories/GHSA-cwq5-8pvq-j65j

ExploitMitigationVendor Advisory