What is CVE-2017-1000355?

CVE-2017-1000355 is a medium-severity vulnerability in Jenkins, classified under Deserialization of Untrusted Data. CVSS score: 6.5/10. Published 2018-01-29.

How severe is CVE-2017-1000355?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2017-1000355 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Jenkins

CVE-2017-1000355

Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an XStream: Java crash when trying to instantiate void/Void.

Vulnerability class: Insecure Deserialization

Published 2018-01-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (77.1th percentile), scored 2026-10-08.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Jenkins

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

PalindromeLabs/Java-Deserialization-CVEs

References

www.securityfocus.com/bid/98066 (VDB Entry, Third Party Advisory, vdb-entry)
jenkins.io/security/advisory/2017-04-26/ (Vendor Advisory)

Frequently asked questions

What is CVE-2017-1000355?: CVE-2017-1000355 is a medium-severity vulnerability in Jenkins, classified under Deserialization of Untrusted Data. CVSS score: 6.5/10. Published 2018-01-29.
How severe is CVE-2017-1000355?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2017-1000355 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.