CVE-2022-1471 — SnakeYaml's Constructor() class does not restrict types which can be instantiate
SnakeYaml's Constructor() class does not restrict types which can be instantiated during deserialization. Deserializing yaml content provided by an attacker can lead to remote code execution. We recommend using SnakeYaml's SafeConsturctor when parsing untrusted content
Published
2022-12-01T10:47:07.203Z
Last modified
2025-06-18T08:32:58.546Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
01What is this vulnerability?
SnakeYaml's Constructor() class does not restrict types which can be instantiated during deserialization. Deserializing yaml content provided by an attacker can lead to remote code execution. We recommend using SnakeYaml's SafeConsturctor when parsing untrusted content to restrict deserialization. We recommend upgrading to version 2.0 and beyond.
02Affected products
| Vendor | Product | Versions |
|---|
| SnakeYAML | SnakeYAML | 0 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2022-12-01T10:47:07.203Z
- Last modified: 2025-06-18T08:32:58.546Z
09References
- github.com — https://github.com/google/security-research/security/advisories/GHSA-mjmj-j48q-9…
- bitbucket.org — https://bitbucket.org/snakeyaml/snakeyaml/issues/561/cve-2022-1471-vulnerability…
- github.com — https://github.com/mbechler/marshalsec
- www.github.com — https://www.github.com/mbechler/marshalsec/blob/master/marshalsec.pdf?raw=true
- groups.google.com — https://groups.google.com/g/kubernetes-security-announce/c/mwrakFaEdnc
- security.netapp.com — https://security.netapp.com/advisory/ntap-20230818-0015/
- packetstormsecurity.com — http://packetstormsecurity.com/files/175095/PyTorch-Model-Server-Registration-De…
- www.openwall.com — http://www.openwall.com/lists/oss-security/2023/11/19/1
- security.netapp.com — https://security.netapp.com/advisory/ntap-20240621-0006/
- infosecwriteups.com — https://infosecwriteups.com/%EF%B8%8F-inside-the-160-comment-fight-to-fix-snakey…
- confluence.atlassian.com — https://confluence.atlassian.com/security/cve-2022-1471-snakeyaml-library-rce-vu…
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