CVE-2024-27317
CriticalApache Pulsar: Pulsar Functions Worker's Archive Extraction Vulnerability Allows Unauthorized File Modification
Published Mar 14, 2024 · Updated Aug 12, 2026 · Also known as GHSA-jg2g-4rjg-cmqh
Key Facts
Patch immediately- CVE-2024-27317 is a critical-severity vulnerability (CVSS 9.9 v3.1) affecting Pulsar (Apache), org.apache.pulsar:pulsar-functions-worker (maven).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 57% probability of exploitation in the next 30 days.
- Fixed versions are available, including Pulsar 2.10.6, Pulsar 2.11.4, Pulsar 3.0.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
57%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2024-27317 brief as a PDF
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Description
In Pulsar Functions Worker, authenticated users can upload functions in jar or nar files. These files, essentially zip files, are extracted by the Functions Worker. However, if a malicious file is uploaded, it could exploit a directory traversal vulnerability. This occurs when the filenames in the zip files, which aren't properly validated, contain special elements like "..", altering the directory path. This could allow an attacker to create or modify files outside of the designated extraction directory, potentially influencing system behavior. 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.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| PulsarApache | 3.2.0, >= 2.4.0 | 2.10.6 |
| org.apache.pulsar:pulsar-functions-workermaven | >= 2.4.0 | 3.2.1 |
Patched Releases
Pulsar
2.10.6, 2.11.4, 3.0.3, 3.1.3, 3.2.1
org.apache.pulsar:pulsar-functions-worker
2.10.6, 2.11.4, 3.0.3, 3.1.3, 3.2.1
Timeline
Publicly disclosed
Mar 14, 2024
Last updated
Aug 12, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27317.json
- advisoryhttps://lists.apache.org/thread/45cqhgqg8d19ongjw18ypcss8vwh206p
- advisoryhttps://lists.apache.org/thread/ct9xmvlf7lompc1pxvlsb60qstfsm9po
- advisoryhttps://lists.apache.org/thread/dh8nj2vmb2br6thjltq74lk9jxkz62wn
FAQ
Common Questions.
In Pulsar Functions Worker, authenticated users can upload functions in jar or nar files.
Affected: Pulsar (Apache) versions 3.2.0, >= 2.4.0; org.apache.pulsar:pulsar-functions-worker (maven) versions >= 2.4.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Pulsar 2.10.6, Pulsar 2.11.4, Pulsar 3.0.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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