CVE-2020-8441 json
Deserialization of Untrusted Data in JYaml
published 2020-02-19 6 y ago modified 2026-06-17 4 mo ago also GHSA-4qhr-q7wf-94xp , EUVD-2022-2430
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.0%
- EPSS 5.0% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
JYaml through 1.3 allows remote code execution during deserialization of a malicious payload through the load() function. NOTE: this is a discontinued product.
Exploit prediction
4.96% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gist.github.com https://gist.github.com/j0lt-github/f5141abcacae63d434ecae211422153a referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.jyaml:jyaml | <=1.3 |
no fix listed |
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
gist.github.com
/j0lt-github/f5141abcacae63d434ecae211422153a
web, exploit, third-party-advisory
-
github.com
/mbechler/marshalsec
web, third-party-advisory
-
github.com
/mbechler/marshalsec/blob/master/marshalsec.pdf
web, technical-description, third-party-advisory
-
sourceforge.net
/p/jyaml/bugs/
third-party-advisory
- security.netapp.com /advisory/ntap-20200313-0001/
-
nvd.nist.gov
/vuln/detail/CVE-2020-8441
advisory
-
security.netapp.com
/advisory/ntap-20200313-0001
web
-
sourceforge.net
/p/jyaml/bugs
web
Sources
- CVE List CVE-2020-8441
- GitHub Advisory GHSA-4qhr-q7wf-94xp
- NVD CVE-2020-8441
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.