CVE-2026-1965

Publication date 11 March 2026

Last updated 13 March 2026

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
curl	25.10 questing	Fixed 8.14.1-2ubuntu1.2
	24.04 LTS noble	Fixed 8.5.0-2ubuntu10.8
	22.04 LTS jammy	Fixed 7.81.0-1ubuntu1.23
	20.04 LTS focal	Vulnerable
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Vulnerable

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
curl	Upstream: 34fa034 Upstream: f1a39f2

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-8084-1
curl vulnerabilities
11 March 2026

Other references

Access our resources on patching vulnerabilities