Ubuntu USN · USN-8470-1

cpp-httplib vulnerability

Published: Thu, 25 Jun 2026 07:53

CVE-2026-45372

Summary

cpp-httplib could mishandle HTTP requests if it received specially crafted network traffic.

Details

It was discovered that cpp-httplib incorrectly percent-decoded HTTP request header values. A remote attacker could use this to inject crafted header content possibly leading to response splitting, log injection or proxy smuggling.

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu jammy

cpp-httplib→0.10.3+ds-1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 0.10.3+ds-1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y cpp-httplib=0.10.3+ds-1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libcpp-httplib-dev→0.10.3+ds-1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 0.10.3+ds-1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib-dev=0.10.3+ds-1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libcpp-httplib0→0.10.3+ds-1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 0.10.3+ds-1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib0=0.10.3+ds-1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

Ubuntu noble

cpp-httplib→0.14.3+ds-1.1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 0.14.3+ds-1.1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y cpp-httplib=0.14.3+ds-1.1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libcpp-httplib-dev→0.14.3+ds-1.1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 0.14.3+ds-1.1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib-dev=0.14.3+ds-1.1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libcpp-httplib0.14t64→0.14.3+ds-1.1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 0.14.3+ds-1.1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib0.14t64=0.14.3+ds-1.1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

Ubuntu questing

cpp-httplib→0.18.7-1ubuntu0.25.10.2apt_upgrade
Standard apt upgrade. Install 0.18.7-1ubuntu0.25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y cpp-httplib
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcpp-httplib-dev→0.18.7-1ubuntu0.25.10.2apt_upgrade
Standard apt upgrade. Install 0.18.7-1ubuntu0.25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcpp-httplib0.18→0.18.7-1ubuntu0.25.10.2apt_upgrade
Standard apt upgrade. Install 0.18.7-1ubuntu0.25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib0.18
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

cpp-httplib→0.26.0+ds-2ubuntu3+esm1apt_upgrade
Standard apt upgrade. Install 0.26.0+ds-2ubuntu3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y cpp-httplib
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcpp-httplib-dev→0.26.0+ds-2ubuntu3+esm1apt_upgrade
Standard apt upgrade. Install 0.26.0+ds-2ubuntu3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcpp-httplib0.26→0.26.0+ds-2ubuntu3+esm1apt_upgrade
Standard apt upgrade. Install 0.26.0+ds-2ubuntu3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcpp-httplib0.26
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Are YOU affected by USN-8470-1?

5-second check on your actual server. Reads /etc/os-release, uname -r, and dpkg-query; matches against the live USN + Debian Security Tracker feeds; tells you whether USN-8470-1 (and any other live CVE) applies. Anonymous, no signup.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan Read the bash source first

Want this automated for your servers?

StackPatch runs this match against YOUR installed packages every hour

Free (3 servers) / from $9/mo (14-day free trial) / Solo $9/mo / Pro $29/mo / Team $79/mo. Indie pricing.

Start free trial →See StackPatch →Live audit log →