CVE-2025-15537: Mapnik dbfile.cpp string_value heap-based overflow

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-18 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

Mapnik: through 4.2.0

References

https://github.com/mapnik/mapnik/
https://github.com/mapnik/mapnik/issues/4543
https://github.com/oneafter/1218/blob/main/repro
https://vuldb.com/?ctiid.341709
https://vuldb.com/?id.341709
https://vuldb.com/?submit.733348
https://github.com/mapnik/mapnik/issues/4543

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