DEBIAN-CVE-2026-52761
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8_to_unicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a char pointer rather than the length of the unicode buffer, allowing rules that use this transformation to be bypassed on i386 architecture. This issue is fixed in version 3.0.16.
DEBIAN-CVE-2026-52761
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-52761
modsecurity
Source reference: /affected/0/package/name
- Affected versions
- 3.0.10-1
Source reference:
/affected/0/versions3.0.11-1Source reference:
/affected/0/versions3.0.12-1Source reference:
/affected/0/versions3.0.12-1.1Source reference:
/affected/0/versions3.0.12-1.1~exp1Source reference:
/affected/0/versions3.0.13-1Source reference:
/affected/0/versions3.0.14-1Source reference:
/affected/0/versions3.0.15-1Source reference:
/affected/0/versions3.0.16-1Source reference:
/affected/0/versions3.0.9-1Source reference:
/affected/0/versions3.0.9-1+deb12u1Source reference:
/affected/0/versions3.0.9-1+deb12u2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
modsecurity
Source reference: /affected/1/package/name
- Affected versions
- 3.0.14-1
Source reference:
/affected/1/versions3.0.14-1+deb13u1Source reference:
/affected/1/versions3.0.15-1Source reference:
/affected/1/versions3.0.16-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
modsecurity
Source reference: /affected/2/package/name
- Affected versions
- 3.0.14-1
Source reference:
/affected/2/versions3.0.15-1Source reference:
/affected/2/versions - Fixed versions
- 3.0.16-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "modsecurity",
"purl": "pkg:deb/debian/modsecurity?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.0.10-1",
"3.0.11-1",
"3.0.12-1",
"3.0.12-1.1",
"3.0.12-1.1~exp1",
"3.0.13-1",
"3.0.14-1",
"3.0.15-1",
"3.0.16-1",
"3.0.9-1",
"3.0.9-1+deb12u1",
"3.0.9-1+deb12u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-52761.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "modsecurity",
"purl": "pkg:deb/debian/modsecurity?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.0.14-1",
"3.0.14-1+deb13u1",
"3.0.15-1",
"3.0.16-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-52761.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.16-1"
}
]
}
],
"package": {
"name": "modsecurity",
"purl": "pkg:deb/debian/modsecurity?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.0.14-1",
"3.0.15-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-52761.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57298 · Revision 1
- Added to Heist Feed
- Publisher date