UBUNTU-CVE-2026-3783

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Source
https://ubuntu.com/security/CVE-2026-3783
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3783.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-3783
Upstream
Downstream
Related
Published
2026-03-11T18:00:00Z
Modified
2026-03-14T09:18:57.516429Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a redirect to a second URL, curl cwould leak that token to the second hostname under some circumstances.

References

Affected packages

Ubuntu:Pro:20.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl@7.68.0-1ubuntu2.25+esm2?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.65.3-1ubuntu3
7.65.3-1ubuntu4
7.66.0-1ubuntu1
7.67.0-2ubuntu1
7.68.0-1ubuntu1
7.68.0-1ubuntu2
7.68.0-1ubuntu2.1
7.68.0-1ubuntu2.2
7.68.0-1ubuntu2.4
7.68.0-1ubuntu2.5
7.68.0-1ubuntu2.6
7.68.0-1ubuntu2.7
7.68.0-1ubuntu2.10
7.68.0-1ubuntu2.11
7.68.0-1ubuntu2.12
7.68.0-1ubuntu2.13
7.68.0-1ubuntu2.14
7.68.0-1ubuntu2.15
7.68.0-1ubuntu2.16
7.68.0-1ubuntu2.18
7.68.0-1ubuntu2.19
7.68.0-1ubuntu2.20
7.68.0-1ubuntu2.21
7.68.0-1ubuntu2.22
7.68.0-1ubuntu2.23
7.68.0-1ubuntu2.24
7.68.0-1ubuntu2.25
7.68.0-1ubuntu2.25+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "7.68.0-1ubuntu2.25+esm2"
        },
        {
            "binary_name": "libcurl3-gnutls",
            "binary_version": "7.68.0-1ubuntu2.25+esm2"
        },
        {
            "binary_name": "libcurl3-nss",
            "binary_version": "7.68.0-1ubuntu2.25+esm2"
        },
        {
            "binary_name": "libcurl4",
            "binary_version": "7.68.0-1ubuntu2.25+esm2"
        },
        {
            "binary_name": "libcurl4-gnutls-dev",
            "binary_version": "7.68.0-1ubuntu2.25+esm2"
        },
        {
            "binary_name": "libcurl4-nss-dev",
            "binary_version": "7.68.0-1ubuntu2.25+esm2"
        },
        {
            "binary_name": "libcurl4-openssl-dev",
            "binary_version": "7.68.0-1ubuntu2.25+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3783.json"

Ubuntu:22.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl@7.81.0-1ubuntu1.23?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.81.0-1ubuntu1.23

Affected versions

7.*
7.74.0-1.3ubuntu2
7.74.0-1.3ubuntu3
7.80.0-3
7.81.0-1
7.81.0-1ubuntu1.1
7.81.0-1ubuntu1.2
7.81.0-1ubuntu1.3
7.81.0-1ubuntu1.4
7.81.0-1ubuntu1.6
7.81.0-1ubuntu1.7
7.81.0-1ubuntu1.8
7.81.0-1ubuntu1.10
7.81.0-1ubuntu1.11
7.81.0-1ubuntu1.13
7.81.0-1ubuntu1.14
7.81.0-1ubuntu1.15
7.81.0-1ubuntu1.16
7.81.0-1ubuntu1.17
7.81.0-1ubuntu1.18
7.81.0-1ubuntu1.19
7.81.0-1ubuntu1.20
7.81.0-1ubuntu1.21
7.81.0-1ubuntu1.22

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "7.81.0-1ubuntu1.23"
        },
        {
            "binary_name": "libcurl3-gnutls",
            "binary_version": "7.81.0-1ubuntu1.23"
        },
        {
            "binary_name": "libcurl3-nss",
            "binary_version": "7.81.0-1ubuntu1.23"
        },
        {
            "binary_name": "libcurl4",
            "binary_version": "7.81.0-1ubuntu1.23"
        },
        {
            "binary_name": "libcurl4-gnutls-dev",
            "binary_version": "7.81.0-1ubuntu1.23"
        },
        {
            "binary_name": "libcurl4-nss-dev",
            "binary_version": "7.81.0-1ubuntu1.23"
        },
        {
            "binary_name": "libcurl4-openssl-dev",
            "binary_version": "7.81.0-1ubuntu1.23"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3783.json"

Ubuntu:24.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl@8.5.0-2ubuntu10.8?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
8.5.0-2ubuntu10.8

Affected versions

8.*
8.2.1-1ubuntu3
8.2.1-1ubuntu3.1
8.4.0-2ubuntu1
8.5.0-2ubuntu1
8.5.0-2ubuntu2
8.5.0-2ubuntu8
8.5.0-2ubuntu9
8.5.0-2ubuntu10
8.5.0-2ubuntu10.1
8.5.0-2ubuntu10.2
8.5.0-2ubuntu10.3
8.5.0-2ubuntu10.4
8.5.0-2ubuntu10.5
8.5.0-2ubuntu10.6
8.5.0-2ubuntu10.7

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "8.5.0-2ubuntu10.8"
        },
        {
            "binary_name": "libcurl3t64-gnutls",
            "binary_version": "8.5.0-2ubuntu10.8"
        },
        {
            "binary_name": "libcurl4-gnutls-dev",
            "binary_version": "8.5.0-2ubuntu10.8"
        },
        {
            "binary_name": "libcurl4-openssl-dev",
            "binary_version": "8.5.0-2ubuntu10.8"
        },
        {
            "binary_name": "libcurl4t64",
            "binary_version": "8.5.0-2ubuntu10.8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3783.json"

Ubuntu:25.10 / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl@8.14.1-2ubuntu1.2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
8.14.1-2ubuntu1.2

Affected versions

8.*
8.12.1-3ubuntu1
8.13.0-5ubuntu1
8.14.1-1ubuntu2
8.14.1-1ubuntu3
8.14.1-2ubuntu1
8.14.1-2ubuntu1.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "8.14.1-2ubuntu1.2"
        },
        {
            "binary_name": "libcurl3t64-gnutls",
            "binary_version": "8.14.1-2ubuntu1.2"
        },
        {
            "binary_name": "libcurl4-gnutls-dev",
            "binary_version": "8.14.1-2ubuntu1.2"
        },
        {
            "binary_name": "libcurl4-openssl-dev",
            "binary_version": "8.14.1-2ubuntu1.2"
        },
        {
            "binary_name": "libcurl4t64",
            "binary_version": "8.14.1-2ubuntu1.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3783.json"