CVE catalog
CVE-2026-5720
miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction
- Severity
- High · CVSS 8.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.67% · Oct 25, 2026
miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.
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 | miniupnpd | sid | 2.3.10-1 | fixed |
| Debian | miniupnpd | forky | 2.3.10-1 | fixed |
| Debian | miniupnpd | trixie | 2.3.9-2+deb13u1 | fixed |
| Debian | miniupnpd | bookworm | 2.3.1-1 | vulnerable |
| Cpe | miniupnpd | Not reported | Not reported | vulnerable |
| Cpe | miniupnpd | Not reported | 2.3.10 | fixed |
| Ubuntu | miniupnpd | noble | 2.3.4-1ubuntu0.1~esm1 | fixed |
| Ubuntu | miniupnpd-iptables | noble | 2.3.4-1ubuntu0.1~esm1 | fixed |
| Ubuntu | miniupnpd-nftables | noble | 2.3.4-1ubuntu0.1~esm1 | fixed |
| Ubuntu | miniupnpd | pro | 2.3.9-2 | vulnerable |
| Ubuntu | miniupnpd | pro | 2.3.9-2build1 | vulnerable |
| Ubuntu | miniupnpd | pro | 2.3.9-2ubuntu0.1~esm1 | fixed |
| Ubuntu | miniupnpd | pro | 2.3.9-2 | vulnerable |
| Ubuntu | miniupnpd | pro | 2.3.9-2build1 | vulnerable |
| Ubuntu | miniupnpd | pro | 2.3.9-2ubuntu0.1~esm1 | fixed |
| Ubuntu | miniupnpd | 25.10 | 2.3.7-2 | vulnerable |
| Ubuntu | miniupnpd | 25.10 | 2.3.9-2 | vulnerable |
| Cpe | miniupnpd | Not reported | 2.3.10 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | miniupnpd | source | sid | 2.3.10-1 | not yet assigned | Not reported | [1134334] |
| Debian | miniupnpd | source | forky | 2.3.10-1 | not yet assigned | Not reported | [1134334] |
| Debian | miniupnpd | source | trixie | 2.3.9-2+deb13u1 | not yet assigned | Not reported | [1134334] |
| Debian | miniupnpd | source | bookworm | (unfixed) | not yet assigned | Not reported | [1134334] |
| Cpe | miniupnpd | cpe | Not reported | 2.3.10 | Not reported | Not reported | Not reported |
| Ubuntu | miniupnpd | deb | noble | 2.3.4-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | miniupnpd-iptables | deb | noble | 2.3.4-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | miniupnpd-nftables | deb | noble | 2.3.4-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | miniupnpd | deb | pro | 2.3.9-2ubuntu0.1~esm1 | Not reported | USN-8731-1 | Not reported |
| Ubuntu | miniupnpd | deb | pro | 2.3.9-2ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2026-5720 | Not reported |
| Cpe | miniupnpd | cpe | Not reported | 2.3.10 | Not reported | NVD-CVE-2026-5720 | Not reported |
Notes
[bookworm] miniupnpd: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [miniupnpd]Affected
Details (2)
2.3.1-1· all · bookwormAffected
nvd · miniupnpd · debian · bookworm; nvd · miniupnpd · debian · 12
2.3.1-1· all · bookwormAffected
nvd · miniupnpd · debian · bookworm; nvd · miniupnpd · debian · 12
- [miniupnpd-iptables]Affected
Source package: [miniupnpd]
Details (2)
2.3.1-1· amd64 · bookwormAffected
nvd · miniupnpd · debian · bookworm; nvd · miniupnpd · debian · 12
2.3.1-1· arm64 · bookwormAffected
nvd · miniupnpd · debian · bookworm; nvd · miniupnpd · debian · 12
- [miniupnpd-nftables]Affected
Source package: [miniupnpd]
Details (2)
2.3.1-1· amd64 · bookwormAffected
nvd · miniupnpd · debian · bookworm; nvd · miniupnpd · debian · 12
2.3.1-1· arm64 · bookwormAffected
nvd · miniupnpd · debian · bookworm; nvd · miniupnpd · debian · 12
[Debian 13 (Trixie)]
- [miniupnpd]Fixed
Details (2)
2.3.9-2+deb13u1· all · trixieFixed · Fixed:
2.3.9-2+deb13u1nvd · miniupnpd · debian · 13
2.3.9-2+deb13u1· all · trixieFixed · Fixed:
2.3.9-2+deb13u1nvd · miniupnpd · debian · 13
- [miniupnpd-iptables]Fixed
Source package: [miniupnpd]
Details (2)
2.3.9-2+deb13u1· amd64 · trixieFixed · Fixed:
2.3.9-2+deb13u1nvd · miniupnpd · debian · 13
2.3.9-2+deb13u1· arm64 · trixieFixed · Fixed:
2.3.9-2+deb13u1nvd · miniupnpd · debian · 13
- [miniupnpd-nftables]Fixed
Source package: [miniupnpd]
Details (2)
2.3.9-2+deb13u1· amd64 · trixieFixed · Fixed:
2.3.9-2+deb13u1nvd · miniupnpd · debian · 13
2.3.9-2+deb13u1· arm64 · trixieFixed · Fixed:
2.3.9-2+deb13u1nvd · miniupnpd · debian · 13
Observed:
References
- [https://github.com/miniupnp/miniupnp/]
- [https://github.com/miniupnp/miniupnp/commit/f56bd09b2f2650126b832c5f30a65a09e28167fa]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-5720]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-5720]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-5720]
- [https://osv.dev/vulnerability/USN-8731-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-5720]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5720.json]
- [https://ubuntu.com/security/notices/USN-8731-1]
- [https://www.vulncheck.com/advisories/miniupnpd-integer-underflow-soapaction-header-parsing]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]