Vulnerability in Apache Httpclient

CVE-2020-13956

Apache HttpClient versions prior to version 4.5.13 and 5.0.3 can misinterpret malformed authority component in request URIs passed to the library as java.net.URI object and pick the wrong target host for request execution.

EPSS: 0.087 (94.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-13956?
CVE-2020-13956 is a medium-severity vulnerability in Apache Httpclient. CVSS score: 5.3/10. Published 2020-12-02.
How severe is CVE-2020-13956?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2020-13956 known to be exploited?
24 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.