How severe is CVE-2022-41854?

CVE-2022-41854 has a CVSS score of 5.8/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2022-41854?

CVE-2022-41854 affects the following packages: org.yaml:snakeyaml (Maven). Ecosystems affected: Maven.

How do I fix CVE-2022-41854?

Update org.yaml:snakeyaml to 1.32 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-41854 is resolved across your whole dependency graph.

How do I detect CVE-2022-41854 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.yaml:snakeyaml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2022-41854 if there is no patch (or I can't update yet)?

Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.

Is CVE-2022-41854 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2022-41854, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2022-41854?

CVE-2022-41854 has an EPSS (Exploit Prediction Scoring System) score of 1.9%, placing it in the 80th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2022-41854?

CVE-2022-41854 is classified as CWE-121 (CWE-121), Out-of-bounds Write (CWE-787). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2022-41854 published, and has it been updated?

CVE-2022-41854 was published on November 11, 2022 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2022-41854 — snakeyaml

MEDIUM

CVE-2022-41854 is a medium-severity (CVSS 5.8) CWE-121 vulnerability in org.yaml:snakeyaml. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for org.yaml:snakeyaml — see the affected versions and patch details below.

Stack Overflow in Snakeyaml

Also known asGHSA-w37g-rhq8-7m4j

Published

Nov 11, 2022

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.9%probability of exploitation in next 30 days

Lower Risk+0.32%

Lower risk than most CVEs80th percentile — riskier than 80% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

☕org.yaml:snakeyaml

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Those using Snakeyaml to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS). If the parser is running on user supplied input, an attacker may supply content that causes the parser to crash by stack overflow. This effect may support a denial of service attack.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.yaml:snakeyaml`	all versions	1.32`org.yaml:snakeyaml:1.32`

Affected Products

2 products · 3 configurations

fedorafedoraproject

2 versions

3637

Application

snakeyamlsnakeyaml_project

< 1.32

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Those using Snakeyaml to parse untrusted YAML files may be vulnerable to…

bugs.chromium.orgNVDNov 2022

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.yaml:snakeyaml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.yaml:snakeyaml to 1.32 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-41854 is resolved across your whole dependency graph.
Workarounds
Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
Migration Toolkit for Runtimes 1 on RHEL 8	`mtr/mtr-web-container-rhel8:1.1-7`	RHSA-2023:3373
MTA-6.2-RHEL-9	`mta/mta-windup-addon-rhel9:6.2.0-11`	RHSA-2023:4627
OCP-Tools-4.12-RHEL-8	`ocp-tools-4/jenkins-agent-base-rhel8:v4.12.0-1683009711`	RHBA-2023:3300
Red Hat AMQ Clients	`dev-java-snakeyaml`	RHSA-2023:7697
Red Hat build of Eclipse Vert.x 4.3.7	`dev-java-snakeyaml`	RHSA-2023:0577
Red Hat Fuse 7.12	`dev-java-snakeyaml`	RHSA-2023:3954
Red Hat JBoss Enterprise Application Platform	`org.yaml/snakeyaml:1.33.0.SP1-redhat-00001`	RHSA-2023:1516
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8	`eap7-snakeyaml-0:1.33.0-2.SP1_redhat_00001.1.el8eap`	RHSA-2023:1513

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2022-41854 in your dependencies?

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