DEBIAN-CVE-2026-54355

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Source
https://security-tracker.debian.org/tracker/CVE-2026-54355
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54355.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-54355
Upstream
Published
2026-09-17T21:17:15Z
Modified
2026-09-21T14:00:07Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

MapServer is a system for developing web-based GIS applications. From 6.0 until 8.6.4, MapServer's OpenLayers HTML output for SERVICE=WMS&REQUEST=GetMap&FORMAT=application/openlayers reflects an attacker-controlled X-Forwarded-Host value received as HTTP_X_FORWARDED_HOST through msBuildOnlineResource(), processLine(), and the [mapserv_onlineresource] substitution in src/maputil.c and src/maptemplate.c without escaping it for a single-quoted JavaScript string. When the deployment trusts the forwarded header and does not configure a fixed ows_onlineresource or MS_ONLINERESOURCE value, embedded single quotes can escape the generated URL string. An unauthenticated attacker can craft a URL that executes arbitrary JavaScript in the MapServer site origin when opened by a victim, enabling access to sessions or tokens, same-origin data and requests, and actions as the victim. This issue is fixed in version 8.6.4.

References

Affected packages

Debian:12 / mapserver

Package

Name
mapserver
Purl
pkg:deb/debian/mapserver?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.0.0-3
8.0.0-3+deb12u1
8.0.1-1~exp1
8.0.1-1
8.0.1-2~bpo12+1
8.0.1-2
8.0.1-2.1~exp1
8.0.1-3~exp1
8.0.1-3
8.0.1-4
8.0.1-5
8.0.2-1~bpo12+1
8.0.2-1
8.2.0~beta1-1~exp1
8.2.0~beta2-1~exp1
8.2.0~beta3-1~exp1
8.2.0~rc1-1~exp1
8.2.0~rc2-1~exp1
8.2.0~rc3-1~exp1
8.2.0-1~bpo12+1
8.2.0-1
8.2.1-1~bpo12+1
8.2.1-1
8.2.2-1~bpo12+1
8.2.2-1
8.4.0~beta1-1~exp1
8.4.0~beta2-1~exp1
8.4.0~rc1-1~exp1
8.4.0-1~bpo12+1
8.4.0-1
8.4.0-2
8.4.0-3
8.4.0-4
8.4.1-1~bpo13+1
8.4.1-1
8.4.1-2
8.6.0~beta1-1~exp1
8.6.0~beta2-1~exp1
8.6.0~rc1-1~exp1
8.6.0-1~bpo13+1
8.6.0-1
8.6.1-1~bpo13+1
8.6.1-1
8.6.2-1~bpo13+1
8.6.2-1
8.6.3-1~bpo13+1
8.6.3-1
8.6.4-1~bpo13+1
8.6.4-1
8.6.5-1~bpo13+1
8.6.5-1
8.6.6-1~bpo13+1
8.6.6-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54355.json"

Debian:13 / mapserver

Package

Name
mapserver
Purl
pkg:deb/debian/mapserver?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.4.0-4
8.4.0-4+deb13u1
8.4.0-4+deb13u2
8.4.1-1~bpo13+1
8.4.1-1
8.4.1-2
8.6.0~beta1-1~exp1
8.6.0~beta2-1~exp1
8.6.0~rc1-1~exp1
8.6.0-1~bpo13+1
8.6.0-1
8.6.1-1~bpo13+1
8.6.1-1
8.6.2-1~bpo13+1
8.6.2-1
8.6.3-1~bpo13+1
8.6.3-1
8.6.4-1~bpo13+1
8.6.4-1
8.6.5-1~bpo13+1
8.6.5-1
8.6.6-1~bpo13+1
8.6.6-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54355.json"

Debian:14 / mapserver

Package

Name
mapserver
Purl
pkg:deb/debian/mapserver?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.6.4-1

Affected versions

8.*
8.4.0-4
8.4.1-1~bpo13+1
8.4.1-1
8.4.1-2
8.6.0~beta1-1~exp1
8.6.0~beta2-1~exp1
8.6.0~rc1-1~exp1
8.6.0-1~bpo13+1
8.6.0-1
8.6.1-1~bpo13+1
8.6.1-1
8.6.2-1~bpo13+1
8.6.2-1
8.6.3-1~bpo13+1
8.6.3-1
8.6.4-1~bpo13+1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54355.json"