miniupnpd: miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to ca...
CVE-2026-5720 is fixed in 5 products on 1 platform, first by miniupnpd 2.0.20171212-2ubuntu0.1~esm1, released April 17, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| miniupnpd · Debian 13.5 (trixie) | 2.3.9-2+deb13u1 | DEBIAN-CVE-2026-5720 | May 15, 2026 |
| miniupnpd · Debian 14 | 2.3.10-1 | DEBIAN-CVE-2026-5720 | May 15, 2026 |
| miniupnpd · Fedora 43 | 2.3.10-1.fc43 | FEDORA-2026-5F908CB040 | Apr 20, 2026 |
| miniupnpd · Ubuntu 18.04.6 LTS (bionic) | 2.0.20171212-2ubuntu0.1~esm1 | miniupnpd 2.0.20171212-2ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd · Ubuntu 20.04 LTS (focal) | 2.1-6.1ubuntu0.1~esm1 | miniupnpd 2.1-6.1ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd · Ubuntu 22.04.1 LTS (jammy) | 2.2.3-1ubuntu0.1~esm1 | miniupnpd 2.2.3-1ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd · Ubuntu 24.04.5 LTS (noble) | 2.3.4-1ubuntu0.1~esm1 | miniupnpd 2.3.4-1ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd · Ubuntu 26.04.1 LTS (resolute) | 2.3.9-2ubuntu0.1~esm1 | miniupnpd 2.3.9-2ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd-debuginfo · Fedora 43 | 2.3.10-1.fc43 | FEDORA-2026-5F908CB040 | Apr 20, 2026 |
| miniupnpd-debugsource · Fedora 43 | 2.3.10-1.fc43 | FEDORA-2026-5F908CB040 | Apr 20, 2026 |
| miniupnpd-iptables · Ubuntu 22.04.1 LTS (jammy) | 2.2.3-1ubuntu0.1~esm1 | miniupnpd-iptables 2.2.3-1ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd-iptables · Ubuntu 24.04.5 LTS (noble) | 2.3.4-1ubuntu0.1~esm1 | miniupnpd-iptables 2.3.4-1ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd-iptables · Ubuntu 26.04.1 LTS (resolute) | 2.3.9-2ubuntu0.1~esm1 | miniupnpd-iptables 2.3.9-2ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd-nftables · Ubuntu 22.04.1 LTS (jammy) | 2.2.3-1ubuntu0.1~esm1 | miniupnpd-nftables 2.2.3-1ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd-nftables · Ubuntu 24.04.5 LTS (noble) | 2.3.4-1ubuntu0.1~esm1 | miniupnpd-nftables 2.3.4-1ubuntu0.1~esm1 | Apr 17, 2026 |
| miniupnpd-nftables · Ubuntu 26.04.1 LTS (resolute) | 2.3.9-2ubuntu0.1~esm1 | miniupnpd-nftables 2.3.9-2ubuntu0.1~esm1 | Apr 17, 2026 |
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