Heap-Based Buffer Overflow in Mapnik Affects Multiple Versions
CVE-2025-15537

4.8MEDIUM

Key Information:

Vendor

Mapnik

Status
Mapnik
Vendor
CVE Published:
18 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15537?

A security flaw has been identified in Mapnik versions up to 4.2.0, specifically affecting the mapnik::dbf_file::string_value function found in plugins/input/shape/dbfile.cpp. This vulnerability allows for a heap-based buffer overflow, which may lead to unauthorized access and manipulation of data. Exploitation of this vulnerability requires local access, and details have been publicly disclosed, raising concerns for users of the affected versions. Despite notifying the project team of the issue through an early report, no official response has been provided yet.

Affected Version(s)

Mapnik 4.0

Mapnik 4.1

Mapnik 4.2.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-15537 - Proof of Concept

References

https://vuldb.com/?id.341709
vdb-entrytechnical-description
https://vuldb.com/?ctiid.341709
signaturepermissions-required
https://vuldb.com/?submit.733348
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
JSON
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