CVE-2024-0338 is a high severity (CVSS 7.3) buffer overflow weakness in XAMPP. No fixed version is confirmed in the record, so check the vendor or project page. It is not listed as exploited in the wild by CISA. Check your own installs against the affected range below.
What's affected
XAMPP from Apache Friends, version 8.2.4 and earlier. The description says a long file debug argument controls the Structured Exception Handler, which could let an attacker execute arbitrary code.
The weakness is mapped to CWE-119, improper restriction of operations within the bounds of a memory buffer, and CWE-120, buffer copy without checking the size of input. The record was published on 2024-02-02. The record's KEV flag is false, so CISA does not list it in the Known Exploited Vulnerabilities catalog.
How to check if you're exposed
This is software you install yourself or an appliance, so start from your own inventory. Find where the product runs, read its version from the application, its package metadata or its install directory, and compare it to the range above.
grep -ril "'+d['short'].split('-')[0]+'" /var/www 2>/dev/null
That searches a typical web root for the product name, so adjust the path to your server. For code you maintain, search for the file and parameter named in the record and read how the value is used.
You can also paste a manifest or SBOM into the free in-browser scanner at Safeguard Gold to see which known CVEs apply to your dependencies. It only covers components that appear in a manifest or SBOM, so a standalone appliance still needs the manual check.
What to do now
- Find every deployment of XAMPP in your environment, including test systems and anything bought or installed by a team outside IT.
- Check the vendor or project page for a fixed release. None is confirmed in the record, so do not assume that upgrading to the latest version resolves it until the notes say so.
- Avoid processing files from untrusted sources with the affected component until it is updated.
- Run any conversion or parsing jobs in a sandbox or a container with reduced rights.
- Rebuild and redeploy anything that statically links or vendors the library, since updating the system package alone will not cover it.
- Re-run a scan after the change and record the date, so you can show the exposure is closed.
Why it matters
Memory safety bugs happen when code reads or writes outside the buffer it was given. The result ranges from a crash to code execution, depending on what sits next to the buffer and what protections the platform adds.
Parsers for media and text formats are common sources of these bugs, because they handle complicated input from many sources. The practical defence is to keep the library current and to limit what untrusted files are processed by it.
The CVSS vector reads as follows. The attack is possible with local access, attack complexity is low, privileges required are low, and user interaction is required. The impact on confidentiality, integrity and availability is high, high and high respectively. A score is a starting point. Your own exposure, meaning whether the product faces the internet and what it can reach, decides the real priority.
Quick check
Is this vulnerability known to be exploited in the wild?
The record's KEV flag is false, so CISA does not list it in the Known Exploited Vulnerabilities catalog. Check the vendor advisory for current status.
Which versions are fixed?
No fixed version is confirmed in the record, so check the vendor or project page.
Sources
The vendor and researcher references listed in the NVD record could not be retrieved when this post was written, so the details above come from the NVD record itself.
Last reviewed: 19 October 2026.
