CVE catalog
CVE-2025-9648
CivetWeb vulnerabilities
- Severity
- High · CVSS 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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 - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.76% · Oct 25, 2026
A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request containing a null byte in the payload, the server enters an infinite loop during form data parsing. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests. This issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | civetweb | sid | 1.16+dfsg-6 | fixed |
| Debian | civetweb | forky | 1.16+dfsg-6 | fixed |
| Debian | civetweb | trixie | 1.16+dfsg-2+deb13u1 | fixed |
| Debian | civetweb | bookworm | 1.15+dfsg-4 | vulnerable |
| Ubuntu | civetweb | noble | Not reported | vulnerable |
| Ubuntu | civetweb | noble | 1.16+dfsg-1ubuntu0.1 | fixed |
| Ubuntu | libcivetweb-dev | noble | 1.16+dfsg-1ubuntu0.1 | fixed |
| Ubuntu | libcivetweb1 | noble | 1.16+dfsg-1ubuntu0.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | civetweb | source | sid | 1.16+dfsg-4 | not yet assigned | Not reported | [1118285] |
| Debian | civetweb | source | forky | 1.16+dfsg-4 | not yet assigned | Not reported | [1118285] |
| Debian | civetweb | source | trixie | 1.16+dfsg-2+deb13u1 | not yet assigned | Not reported | [1118285] |
| Debian | civetweb | source | bookworm | (unfixed) | not yet assigned | Not reported | [1118285] |
| Ubuntu | civetweb | deb | noble | 1.16+dfsg-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libcivetweb-dev | deb | noble | 1.16+dfsg-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libcivetweb1 | deb | noble | 1.16+dfsg-1ubuntu0.1 | Not reported | Not reported | Not reported |
Notes
[bookworm] civetweb: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [civetweb]Affected
Details (2)
1.15+dfsg-4· amd64 · bookwormAffected
usn · civetweb · debian · bookworm; usn · civetweb · debian · 12
1.15+dfsg-4· arm64 · bookwormAffected
usn · civetweb · debian · bookworm; usn · civetweb · debian · 12
- [libcivetweb1]Affected
Source package: [civetweb]
Details (2)
1.15+dfsg-4· amd64 · bookwormAffected
usn · civetweb · debian · bookworm; usn · civetweb · debian · 12
1.15+dfsg-4· arm64 · bookwormAffected
usn · civetweb · debian · bookworm; usn · civetweb · debian · 12
- [libcivetweb-dev]Affected
Source package: [civetweb]
Details (2)
1.15+dfsg-4· amd64 · bookwormAffected
usn · civetweb · debian · bookworm; usn · civetweb · debian · 12
1.15+dfsg-4· arm64 · bookwormAffected
usn · civetweb · debian · bookworm; usn · civetweb · debian · 12
[Debian 13 (Trixie)]
- [civetweb]Fixed
Details (2)
1.16+dfsg-2+deb13u1· amd64 · trixieFixed · Fixed:
1.16+dfsg-2+deb13u1usn · civetweb · debian · 13
1.16+dfsg-2+deb13u1· arm64 · trixieFixed · Fixed:
1.16+dfsg-2+deb13u1usn · civetweb · debian · 13
- [libcivetweb1]Fixed
Source package: [civetweb]
Details (2)
1.16+dfsg-2+deb13u1· amd64 · trixieFixed · Fixed:
1.16+dfsg-2+deb13u1usn · civetweb · debian · 13
1.16+dfsg-2+deb13u1· arm64 · trixieFixed · Fixed:
1.16+dfsg-2+deb13u1usn · civetweb · debian · 13
- [libcivetweb-dev]Fixed
Source package: [civetweb]
Details (2)
1.16+dfsg-2+deb13u1· amd64 · trixieFixed · Fixed:
1.16+dfsg-2+deb13u1usn · civetweb · debian · 13
1.16+dfsg-2+deb13u1· arm64 · trixieFixed · Fixed:
1.16+dfsg-2+deb13u1usn · civetweb · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2025-9648]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-9648]
- [https://security-tracker.debian.org/tracker/CVE-2025-9648]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-9648.json]
- [https://ubuntu.com/security/notices/USN-8749-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2668.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]