UBUNTU-CVE-2026-93600

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Source
https://ubuntu.com/security/CVE-2026-93600
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93600.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-93600
Upstream
Published
2026-09-18T14:19:00Z
Modified
2026-09-23T23:40:09Z
Severity
  • 2.2 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • 2.1 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

rustls-webpki (rustls/webpki) versions 0.101.0 through 0.103.11 and 0.104.0-alpha releases before 0.104.0-alpha.6 ignore X.509 name constraints that apply to URI names, causing such constraints to be accepted rather than enforced. Because name constraints are restrictions on otherwise properly issued certificates, the flaw is only reachable after successful signature verification and requires a misissued certificate to exploit; the library also provides no API for asserting URI names, and URI name constraints are otherwise unimplemented. Versions 0.103.12 and 0.104.0-alpha.6 reject URI name constraints unconditionally.

References

Affected packages

Ubuntu:24.04:LTS / rust-rustls-webpki

Package

Name
rust-rustls-webpki
Purl
pkg:deb/ubuntu/rust-rustls-webpki?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.101.4-4
0.101.7-2.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "librust-rustls-webpki-dev",
            "binary_version":  "0.101.7-2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93600.json"

Ubuntu:26.04:LTS / rust-rustls-webpki

Package

Name
rust-rustls-webpki
Purl
pkg:deb/ubuntu/rust-rustls-webpki?arch=source&distro=resolute

Affected ranges

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

Affected versions

0.*
0.102.8-5
0.103.7-1
0.103.7-1build1
0.103.9+ds-1
0.103.9+ds-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "librust-rustls-webpki-dev",
            "binary_version":  "0.103.9+ds-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93600.json"