PT-2026-28511 · Mapserver · Mapserver

Kevin-Valerio · Publicado 2026-03-27 · Atualizado 2026-03-28 · CVE-2026-33721

Positive Technologies (AI Summary)

CVSS v3.1

7.5

Alta

Vetor base

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions MapServer versions 4.2 through 8.6.0

Description MapServer is a system for developing web-based GIS applications. A heap-buffer-overflow write in MapServer’s SLD (Styled Layer Descriptor) parser allows a remote, unauthenticated attacker to crash the MapServer process. This occurs by sending a crafted SLD with more than 100 Threshold elements inside a ColorMap/Categorize structure, commonly reachable via WMS GetMap with the SLD BODY parameter. The vulnerable component is the SLD parser.

Recommendations Update to MapServer version 8.6.1 or later.

Exploit

Correção

Memory Corruption

Enumeração de Fraquezas

CWE-787

Identificadores relacionados

CVE-2026-33721

GHSA-CV4M-MR84-FGJP

OPENSUSE-SU-2026:10452-1

OPENSUSE-SU-2026:20476-1

OPENSUSE-SU-2026:20857-1

Produtos afetados

Mapserver

Referências · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33721.json · Exploit
• https://github.com/MapServer/MapServer/releases/tag/rel-8-6-1 · Nota
• https://github.com/MapServer/MapServer/security/advisories/GHSA-cv4m-mr84-fgjp · Aviso do Fabricante
• https://security-tracker.debian.org/tracker/CVE-2026-33721 · Aviso do Fabricante
• https://osv.dev/vulnerability/openSUSE-SU-2026:10452-1 · Aviso do Fabricante
• https://ubuntu.com/security/CVE-2026-33721 · Aviso do Fabricante
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-33721 · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2026-33721 · Nota de Segurança
• https://osv.dev/vulnerability/CVE-2026-33721 · Aviso do Fabricante
• https://suse.com/security/cve/CVE-2026-33721 · Nota
• https://twitter.com/CVEnew/status/2037513394836615590 · Publicação no Twitter
• https://cve.org/CVERecord?id=CVE-2026-33721 · Nota de Segurança
• https://lists.debian.org/debian-lts-announce/2026/04/msg00017.html · Nota
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33721 · Aviso do Fabricante