USN-8893-1: Libwebsockets vulnerabilities — USN-8893-1

Summary

It was discovered that libwebsockets did not properly validate user-supplied data when parsing HTTP/2 HPACK path headers, which could result in a write past the end of an allocated buffer. An attacker could possibly use this issue to execute arbitrary code. (CVE-2026-19773) It was discovered that libwebsockets did not properly handle CBOR recording in the LECP parser, which could result in a write past the end of…

Timeline

Published by source

2026-10-07

Risk context

• Reported severity or threat level: medium.
• Review exposure for the affected product or family: Ubuntu.

Product

Ubuntu

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

USN-8893-1

Source

Ubuntu

Vendor

Ubuntu

Published by source

2026-10-07

Last source activity

2026-10-07

Additional identifiers

CVE-2026-19773

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.