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Vulnerability details: VCID-ab48-azj9-p3hq
Vulnerability ID VCID-ab48-azj9-p3hq
Aliases CVE-2026-1965
Summary curl: curl: Authentication bypass due to incorrect connection reuse with Negotiate authentication
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-303 Incorrect Implementation of Authentication Algorithm
CWE-305 Authentication Bypass by Primary Weakness
System Score Found at
cvssv3 6.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-1965.json
epss 0.00073 https://api.first.org/data/v1/epss?cve=CVE-2026-1965
cvssv3.1 6.5 https://curl.se/docs/CVE-2026-1965.html
cvssv3.1 Medium https://curl.se/docs/CVE-2026-1965.html
ssvc Track https://curl.se/docs/CVE-2026-1965.html
cvssv3.1 6.5 https://curl.se/docs/CVE-2026-1965.json
ssvc Track https://curl.se/docs/CVE-2026-1965.json
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-1965.json
https://api.first.org/data/v1/epss?cve=CVE-2026-1965
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-1965
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2446448 https://bugzilla.redhat.com/show_bug.cgi?id=2446448
CVE-2026-1965.html https://curl.se/docs/CVE-2026-1965.html
CVE-2026-1965.json https://curl.se/docs/CVE-2026-1965.json
RHSA-2026:6893 https://access.redhat.com/errata/RHSA-2026:6893
USN-8084-1 https://usn.ubuntu.com/8084-1/
USN-8099-1 https://usn.ubuntu.com/8099-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-1965.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Found at https://curl.se/docs/CVE-2026-1965.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-11T14:31:56Z/ Found at https://curl.se/docs/CVE-2026-1965.html
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Found at https://curl.se/docs/CVE-2026-1965.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-11T14:31:56Z/ Found at https://curl.se/docs/CVE-2026-1965.json
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.22163
EPSS Score 0.00073
Published At May 29, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-29T08:42:56.035224+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-1965.json 38.6.0