DEBIAN-CVE-2026-30923

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2026-30923
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30923.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-30923
Upstream
  • CVE-2026-30923
Published
2026-05-05T19:16:21.567Z
Modified
2026-05-12T05:00:25.996824Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a single character. An attacker can exploit this to crash worker processes, causing a denial of service. Service resumes once the attack stops as worker processes recover from the segfault. All versions before 3.0.15 of libModSecurity3 are affected. This has been patched in version 3.0.15.

References

Affected packages

Debian:11 / modsecurity

Package

Name
modsecurity
Purl
pkg:deb/debian/modsecurity?arch=source

Affected ranges

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

Affected versions

3.*
3.0.4-2
3.0.6-1
3.0.8-1
3.0.8-2
3.0.8-3
3.0.9-1
3.0.10-1
3.0.11-1
3.0.12-1
3.0.12-1.1~exp1
3.0.12-1.1
3.0.13-1
3.0.14-1
3.0.15-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30923.json"

Debian:12 / modsecurity

Package

Name
modsecurity
Purl
pkg:deb/debian/modsecurity?arch=source

Affected ranges

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

Affected versions

3.*
3.0.9-1
3.0.9-1+deb12u1
3.0.10-1
3.0.11-1
3.0.12-1
3.0.12-1.1~exp1
3.0.12-1.1
3.0.13-1
3.0.14-1
3.0.15-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30923.json"

Debian:13 / modsecurity

Package

Name
modsecurity
Purl
pkg:deb/debian/modsecurity?arch=source

Affected ranges

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

Affected versions

3.*
3.0.14-1
3.0.15-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30923.json"

Debian:14 / modsecurity

Package

Name
modsecurity
Purl
pkg:deb/debian/modsecurity?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0.15-1

Affected versions

3.*
3.0.14-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30923.json"