CVE-2025-15537Public exploit

Application crash via unchecked DBF field length

Published Jan 18, 2026 · Updated Jan 18, 2026

Heap-based buffer over-read in Mapnik 4.2.0 and earlier allows local users to crash applications by processing a malformed shapefile. In dbf_file::string_value, a DBF-header-derived offset and length reach the std::string constructor without validation against the allocated buffer. Exploitation requires local processing of attacker-controlled shapefile data; the demonstrated consequence is a SIGABRT process crash.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer over-read in Mapnik 4.2.0 and earlier allows local users to crash applications by processing a malformed shapefile. In dbf_file::string_value, a DBF-header-derived offset and length reach the std::string constructor without validation against the allocated buffer. Exploitation requires local processing of attacker-controlled shapefile data; the demonstrated consequence is a SIGABRT process crash.

The record

CVE
CVE-2025-15537
Published
Jan 18, 2026
Updated
Jan 18, 2026
Vendor
Mapnik
Product
Mapnik
Classifications
CWE-119, CWE-787, CWE-122
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0
  2. Affected versionversion=4.1
  3. Affected versionversion=4.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Mapnik · Mapnikversion=4.0; version=4.1; version=4.2.0

Published CVSS scores

4.8VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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