CVE-2024-27135Network attack vector

Authenticated Java code execution outside sandbox

Published Mar 12, 2024 · Updated Feb 13, 2025

Improper input validation in affected Apache Pulsar releases allows remote authenticated users to execute arbitrary Java code. Apache has not published which Function Worker input is insufficiently validated or how it escapes the function sandbox. The code runs in the Function Worker process outside its sandbox; brokers are exposed only when functionsWorkerEnabled is true.

CVSS severity8.5
High
EPSS probability5.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in affected Apache Pulsar releases allows remote authenticated users to execute arbitrary Java code. Apache has not published which Function Worker input is insufficiently validated or how it escapes the function sandbox. The code runs in the Function Worker process outside its sandbox; brokers are exposed only when functionsWorkerEnabled is true.

The record

CVE
CVE-2024-27135
Published
Mar 12, 2024
Updated
Feb 13, 2025
Vendor
The Apache Software Foundation
Product
Apache Pulsar
Classifications
CWE-913, CWE-20, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.11.0 <2.11.4
  2. Affected versionversion=2.4.0 <2.10.6
  3. Affected versionversion=3.0.0 <3.0.3
  4. Affected versionversion=3.1.0 <3.1.3
  5. Affected versionversion=3.2.0 <3.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Pulsarversion=2.11.0 <2.11.4; version=2.4.0 <2.10.6; version=3.0.0 <3.0.3; version=3.1.0 <3.1.3; version=3.2.0 <3.2.1

Published CVSS scores

8.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-913Improper Control of Dynamically-Managed Code Resources
CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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