CVE-2022-41854: Those using Snakeyaml to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)

Q: How do I fix CVE-2022-41854?

snakeyaml: upgrade to 1.32; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-41854 being exploited?

CVE-2022-41854 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-41854 affect?

CVE-2022-41854 affects snakeyaml, fedora. Severity is medium (CVSS 5.8). 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. Thi

Q: How urgent is CVE-2022-41854?

Priority 44/100. Public exploit reference

This month

MEDIUM 5.8UPGRADEMITIGATE

CVE-2022-41854 is a medium-severity flaw (CVSS 5.8) affecting snakeyaml, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2022-11-11
Last modified	2026-06-17

Publisher (CNA): Google Inc. · Vendor: fedoraproject · snakeyaml project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-11-11 13:15 UTCPublished CVE record published
2026-06-17 05:03 UTCUpdated Record last modified

snakeyaml project snakeyaml UPGRADE

Affected: < 1.32

Fixed in: 1.32

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy snakeyaml || rpm -q snakeyaml || snakeyaml --version

2. UPGRADE to 1.32 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade snakeyaml

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade snakeyaml

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 36 · 37

Fixed in: no fixed release known

Safe to downgrade to: a release before 36

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-41854?

snakeyaml: upgrade to 1.32; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-41854 being exploited?

CVE-2022-41854 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-41854 affect?

CVE-2022-41854 affects snakeyaml, fedora. Severity is medium (CVSS 5.8). 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. Thi

How urgent is CVE-2022-41854?

Priority 44/100. Public exploit reference

Related CVEs

CVE-2022-38752 MEDIUM 6.5 UPGRADE Using snakeYAML to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)
CVE-2022-38751 MEDIUM 6.5 UPGRADE MITIGATE Using snakeYAML to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)
CVE-2022-38750 MEDIUM 6.5 UPGRADE MITIGATE Using snakeYAML to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)
CVE-2022-38749 MEDIUM 6.5 UPGRADE MITIGATE Using snakeYAML to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)
CVE-2022-25857 HIGH 7.5 UPGRADE MITIGATE The package org.yaml:snakeyaml from 0 and before 1.31 are vulnerable to Denial of Service (DoS) due missing to

References

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