CVE-2026-1965

Publication date 11 March 2026

Last updated 17 March 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

Description

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

Read the notes from the security team

Status

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
Fixed 7.68.0-1ubuntu2.25+esm3
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

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Notes

john-breton

Versions of cURL prior to and including 7.58.0 forcibly close Negotiate connections and are therefore immune to this connection reuse vulnerability.

Patch details

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

Package Patch details
curl

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)

Other references

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