CVE-2023-24621: An issue was discovered in Esoteric YamlBeans through 1.15

Q: How do I fix CVE-2023-24621?

yamlbeans: upgrade to newer than 1.15. Exact commands for each OS are on this page.

Q: Is CVE-2023-24621 being exploited?

CVE-2023-24621 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-2023-24621 affect?

CVE-2023-24621 affects yamlbeans. Severity is high (CVSS 7.8). An issue was discovered in Esoteric YamlBeans through 1.15. It allows untrusted deserialisation to Java classes by default, where the data and class are controlled by the author of the YAML document being processed.

Q: How urgent is CVE-2023-24621?

Priority 42/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADE

CVE-2023-24621 is a high-severity flaw (CVSS 7.8) affecting yamlbeans. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Esoteric YamlBeans through 1.15. It allows untrusted deserialisation to Java classes by default, where the data and class are controlled by the author of the YAML document being processed.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-502
Published	2023-08-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: esotericsoftware

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

Am I affected?

Timeline

2023-08-25 20:15 UTCPublished CVE record published
2026-06-17 05:39 UTCUpdated Record last modified

esotericsoftware yamlbeans UPGRADE

Affected: <= 1.15

Fixed in: newer than 1.15

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.15 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade yamlbeans

Note

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

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-2023-24621?

yamlbeans: upgrade to newer than 1.15. Exact commands for each OS are on this page.

Is CVE-2023-24621 being exploited?

CVE-2023-24621 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-2023-24621 affect?

CVE-2023-24621 affects yamlbeans. Severity is high (CVSS 7.8). An issue was discovered in Esoteric YamlBeans through 1.15. It allows untrusted deserialisation to Java classes by default, where the data and class are controlled by the author of the YAML document being processed.

How urgent is CVE-2023-24621?

Priority 42/100. High severity; Public exploit reference

Software pages

Java vulnerabilities

Related CVEs

CVE-2023-24620 MEDIUM 5.5 UPGRADE An issue was discovered in Esoteric YamlBeans through 1.15

References

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