CVE-2022-38751: Using snakeYAML to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)

Q: How do I fix CVE-2022-38751?

snakeyaml: upgrade to 1.31; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-38751 being exploited?

CVE-2022-38751 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-2022-38751 affect?

CVE-2022-38751 affects snakeyaml, debian linux. Severity is medium (CVSS 6.5). 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 stackoverflow.

Q: How urgent is CVE-2022-38751?

Priority 48/100. On your watchlist

This month

MEDIUM 6.5WATCHLISTUPGRADEMITIGATE

CVE-2022-38751 is a medium-severity flaw (CVSS 6.5) affecting snakeyaml, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 stackoverflow.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2022-09-05
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2022-09-05 10:15 UTCPublished CVE record published
2026-06-17 04:57 UTCUpdated Record last modified

snakeyaml project snakeyaml UPGRADE

Affected: < 1.31

Fixed in: 1.31

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.31 (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.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

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-2022-38751?

snakeyaml: upgrade to 1.31; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-38751 being exploited?

CVE-2022-38751 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-2022-38751 affect?

CVE-2022-38751 affects snakeyaml, debian linux. Severity is medium (CVSS 6.5). 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 stackoverflow.

How urgent is CVE-2022-38751?

Priority 48/100. On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2022-41854 MEDIUM 5.8 UPGRADE MITIGATE Those using Snakeyaml to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)
CVE-2022-38752 MEDIUM 6.5 UPGRADE Using snakeYAML to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS)
CVE-2022-38750 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

← Back to latest CVEs