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NVD / CVE Program· CNA apache

CVE-2024-27135: Apache Pulsar: Improper Input Validation in Pulsar Function Worker allows Remote Code Execution

CriticalCVSS 9.9 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Plan (action score 41/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 5.9% (FIRST EPSS); higher than 93.3% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Apache Software Foundation Apache Pulsar 2.10.6, 2.11.4, 3.0.3.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Add it to your regular patch cycle. Upgrade to Apache Software Foundation Apache Pulsar 2.10.6, 2.11.4, 3.0.3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Mar 12, 2024
Updated
Jun 17, 2026
EPSS
5.9% · 93th percentile

Report tools

JSON

Action score

41

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 5.9%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.9
CNA · apache
8.5
1.4 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-27135

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
apachepulsar

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

  • Apache Software Foundation Apache Pulsar

    • 2.4.0 and later · before 2.10.6affected · semver
    • 2.11.0 and later · before 2.11.4affected · semver
    • 3.0.0 and later · before 3.0.3affected · semver
    • 3.1.0 and later · before 3.1.3affected · semver
    • 3.2.0 and later · before 3.2.1affected · semver
Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache pulsar2.4.0 and later · before 2.10.6
  • apache pulsar2.11.0 and later · before 2.11.4
  • apache pulsar3.0.0 and later · before 3.0.3
  • apache pulsar3.1.0 and later · before 3.1.3
  • apache pulsar3.2.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenorg.apache.pulsar:pulsar-functions-workerfrom 2.11.0 · before 2.11.42.11.4
Mavenorg.apache.pulsar:pulsar-functions-workerfrom 2.4.0 · before 2.10.62.10.6
Mavenorg.apache.pulsar:pulsar-functions-workerfrom 3.0.0 · before 3.0.33.0.3
Mavenorg.apache.pulsar:pulsar-functions-workerfrom 3.1.0 · before 3.1.33.1.3
Mavenorg.apache.pulsar:pulsar-functions-workerfrom 3.2.0 · before 3.2.13.2.1

Same product

apache: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-27317Apache Pulsar: Pulsar Functions Worker's Archive Extraction Vulnerability Allows Unauthorized File Modification
    56Plan
  • CVE-2021-22160Authentication with JWT allows use of “none”-algorithm
    55Plan
  • CVE-2024-27894Apache Pulsar: Pulsar Functions Worker Allows Unauthorized File Access and Unauthorized HTTP/HTTPS Proxying
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2023-51437Feb 7, 2024 · Apache Pulsar: Timing attack in SASL token signature verification
    29Monitor
  • ← EarlierCVE-2022-34321Mar 12, 2024 · Apache Pulsar: Improper Authentication for Pulsar Proxy Statistics Endpoint
    33Monitor
  • Later →CVE-2024-28098Mar 12, 2024 · Apache Pulsar: Improper Authorization For Topic-Level Policy Management
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Apache Software Foundation Apache Pulsar2.10.6Vendor (CNA)
Apache Software Foundation Apache Pulsar2.11.4Vendor (CNA)
Apache Software Foundation Apache Pulsar3.0.3Vendor (CNA)
Apache Software Foundation Apache Pulsar3.1.3Vendor (CNA)
Apache Software Foundation Apache Pulsar3.2.1Vendor (CNA)
Maven:org.apache.pulsar:pulsar-functions-worker2.10.6Package registry (OSV)
Maven:org.apache.pulsar:pulsar-functions-worker2.11.4Package registry (OSV)
Maven:org.apache.pulsar:pulsar-functions-worker3.0.3Package registry (OSV)
Maven:org.apache.pulsar:pulsar-functions-worker3.1.3Package registry (OSV)
Maven:org.apache.pulsar:pulsar-functions-worker3.2.1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-278940 days apartApache Pulsar: Pulsar Functions Worker Allows Unauthorized File Access and Unauthorized HTTP/HTTPS Proxying
    36Monitor
  • CVE-2022-24280536 days apartApache Pulsar Proxy target broker address isn't validated
    26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2022-343210 days apartApache Pulsar: Improper Authentication for Pulsar Proxy Statistics Endpoint
    33Monitor
  • CVE-2023-3754483 days apartApache Pulsar WebSocket Proxy: Improper Authentication for WebSocket Proxy Endpoint Allows DoS
    30Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records