Ubuntu USN · USN-8233-1

nghttp2 vulnerability

Published: Tue, 05 May 2026 17:07

CVE-2026-27135

Summary

nghttp2 could be made to crash if it received specially crafted network traffic.

Details

Andrew MacPherson discovered that nghttp2 did not properly validate internal state when the session termination API was called. A remote attacker could possibly use this issue to cause nghttp2 to crash, resulting in a denial of service.

Recommended actions per Ubuntu release

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

Ubuntu bionic

nghttp2→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-14→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-14
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-dev→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-doc→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-client→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-client
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-proxy→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-proxy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-server→1.30.0-1ubuntu1+esm3apt_upgrade
Standard apt upgrade. Install 1.30.0-1ubuntu1+esm3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu focal

nghttp2→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-14→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-14
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-dev→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-doc→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-client→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-client
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-proxy→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-proxy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-server→1.40.0-1ubuntu0.3+esm1apt_upgrade
Standard apt upgrade. Install 1.40.0-1ubuntu0.3+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu jammy

nghttp2→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-14→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-14
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-dev→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-doc→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-client→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-client
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-proxy→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-proxy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-server→1.43.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.43.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

nghttp2→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-14→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-14
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-dev→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-doc→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-client→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-client
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-proxy→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-proxy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-server→1.59.0-1ubuntu0.3apt_upgrade
Standard apt upgrade. Install 1.59.0-1ubuntu0.3 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

nghttp2→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-14→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-14
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-dev→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libnghttp2-doc→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libnghttp2-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-client→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-client
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-proxy→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-proxy
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nghttp2-server→1.64.0-1.1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 1.64.0-1.1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nghttp2-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu xenial

nghttp2→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 nghttp2=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libnghttp2-14→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 libnghttp2-14=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libnghttp2-dev→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 libnghttp2-dev=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libnghttp2-doc→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 libnghttp2-doc=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
nghttp2→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 nghttp2=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
nghttp2-client→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 nghttp2-client=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
nghttp2-proxy→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 nghttp2-proxy=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
nghttp2-server→1.7.1-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 1.7.1-1ubuntu0.1~esm3 — 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 nghttp2-server=1.7.1-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

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