Buffer overflow in Mapnik
CVE-2025-15537
A security vulnerability has been detected in Mapnik up to 4.2.0. This issue affects the function mapnik::dbf_file::string_value of the file plugins/input/shape/dbfile.cpp. Such manipulation leads to heap-based buffer overflow. The attack must be carried out locally. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (10.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Mapnik
- Mapnik — versions 4.0, 4.1, 4.2.0
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/mapnik/mapnik/issues/4543 (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- github.com/oneafter/1218/blob/main/repro (Product, exploit)
- github.com/mapnik/mapnik/ (product)
Frequently asked questions
- What is CVE-2025-15537?
- CVE-2025-15537 is a medium-severity vulnerability in Mapnik, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-01-18.
- How severe is CVE-2025-15537?
- Medium severity. CVSS v3 base score is 5.3 out of 10.