Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2017-20189

26
FAUCET Score

CVE-2017-20189 describes a critical deserialization vulnerability in Clojure versions prior to 1.9.0, allowing for arbitrary code execution if a server deserializes untrusted objects. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network without user interaction, leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.9.0CPE matchmatch criteria
cpe:2.3:a:clojure:clojure:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.32%
Probability of exploitation in next 30 days
EPSS Percentile
67.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0132 is in the 54th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.clojure:clojureFixed in: 1.9.0

Vendor Advisories (1)

mavenGHSA-jgxc-8mwq-9xqwcritical

Clojure classes can be used to craft a serialized object that runs arbitrary code on deserialization

Jan 22, 2024

References

security.netapp.com / advisory/ntap-20241108-0002
clojure.atlassian.net / browse/CLJ-2204
ExploitPatchVendor Advisory
github.com / clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
Patch
github.com / frohoff/ysoserial/pull/68/files
Patch
hackmd.io / %40fe1w0/HyefvRQKp
ExploitThird Party Advisory
security.snyk.io / vuln/SNYK-JAVA-ORGCLOJURE-5740378
PatchThird Party Advisory