What is CVE-2024-27135?

CVE-2024-27135 is a high-severity vulnerability in Apache Pulsar, classified under Improper Input Validation. CVSS score: 8.5/10. Published 2024-03-12.

How severe is CVE-2024-27135?

High severity. CVSS v3 base score is 8.5 out of 10.

Improper input validation in Apache Pulsar

CVE-2024-27135

Improper input validation in the Pulsar Function Worker allows a malicious authenticated user to execute arbitrary Java code on the Pulsar Function worker, outside of the sandboxes designated for running user-provided functions. This vulnerability also applies to the Pulsar Broker when it is configured with "functionsWorkerEnabled=true". This issue affects Apache Pulsar versions from 2.4.0 to 2.10.5, from 2.11.0 to 2.11.3, from 3.0.0 to 3.0.2, from 3.1.0 to 3.1.2, and 3.2.0. 2.10 Pulsar Function Worker users should upgrade to at least 2.10.6. 2.11 Pulsar Function Worker users should upgrade to at least 2.11.4. 3.0 Pulsar Function Worker users should upgrade to at least 3.0.3. 3.1 Pulsar Function Worker users should upgrade to at least 3.1.3. 3.2 Pulsar Function Worker users should upgrade to at least 3.2.1. Users operating versions prior to those listed above should upgrade to the aforementioned patched versions or newer versions.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2024-03-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.060 (93.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.060 · newest: 0.060 · change: 0.000

Affected products

Apache Pulsar — versions 3.2.0
Apache Software Foundation Pulsar — versions 2.4.0, 2.11.0, 3.0.0

Weakness classification (CWE)

References

lists.apache.org/thread/dh8nj2vmb2br6thjltq74lk9jxkz62wn (Vendor Advisory, mailing-list)
pulsar.apache.org/security/CVE-2024-27135/ (vendor-advisory, Vendor Advisory)
www.openwall.com/lists/oss-security/2024/03/12/9 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2024-27135?: CVE-2024-27135 is a high-severity vulnerability in Apache Pulsar, classified under Improper Input Validation. CVSS score: 8.5/10. Published 2024-03-12.
How severe is CVE-2024-27135?: High severity. CVSS v3 base score is 8.5 out of 10.