What is CVE-2023-26464?

CVE-2023-26464 is a high-severity vulnerability in Apache Log4j, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2023-03-10.

How severe is CVE-2023-26464?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-26464 known to be exploited?

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

Deserialization in Apache Log4j

CVE-2023-26464

** UNSUPPORTED WHEN ASSIGNED ** When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE less than 1.7, an attacker that manages to cause a logging entry involving a specially-crafted (ie, deeply nested) hashmap or hash…

Vulnerability class: Insecure Deserialization

EPSS: 0.019 (77.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apache Log4j
Apache Software Foundation Log4j — versions 1.0.4, 2

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

karimhabush/cyberowl

References

security@apache.org (vendor-advisory, Mailing List)
security@apache.org

Frequently asked questions

What is CVE-2023-26464?: CVE-2023-26464 is a high-severity vulnerability in Apache Log4j, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2023-03-10.
How severe is CVE-2023-26464?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-26464 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.