DEBIAN-CVE-2026-34873

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Source
https://security-tracker.debian.org/tracker/CVE-2026-34873
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34873.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-34873
Upstream
  • CVE-2026-34873
Published
2026-04-01T21:17:01.990Z
Modified
2026-04-03T10:01:44.322294Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
[none]
Details

An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.

References

Affected packages

Debian:11 / mbedtls

Package

Name
mbedtls
Purl
pkg:deb/debian/mbedtls?arch=source

Affected ranges

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

Affected versions

2.*
2.16.9-0.1
2.16.9-0.1+deb11u1
2.16.9-0.1+deb11u2
2.16.9-0.1+deb11u3
2.16.11-0.1
2.16.11-0.2
2.16.11-0.3
2.28.0-0.1
2.28.0-0.2
2.28.0-0.3
2.28.0-1
2.28.0-2
2.28.1-1
2.28.2-1
2.28.3-1
2.28.4-1
2.28.5-1
2.28.6-1
2.28.7-1
2.28.7-1.1~exp1
2.28.7-1.1
2.28.8-1
3.*
3.6.0-1
3.6.0-2
3.6.0-3
3.6.2-1
3.6.2-2
3.6.2-3
3.6.3-1
3.6.4-1
3.6.4-2
3.6.5-0.1~deb13u1
3.6.5-0.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34873.json"

Debian:12 / mbedtls

Package

Name
mbedtls
Purl
pkg:deb/debian/mbedtls?arch=source

Affected ranges

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

Affected versions

2.*
2.28.3-1
2.28.4-1
2.28.5-1
2.28.6-1
2.28.7-1
2.28.7-1.1~exp1
2.28.7-1.1
2.28.8-1
3.*
3.6.0-1
3.6.0-2
3.6.0-3
3.6.2-1
3.6.2-2
3.6.2-3
3.6.3-1
3.6.4-1
3.6.4-2
3.6.5-0.1~deb13u1
3.6.5-0.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34873.json"

Debian:13 / mbedtls

Package

Name
mbedtls
Purl
pkg:deb/debian/mbedtls?arch=source

Affected ranges

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

Affected versions

3.*
3.6.4-2
3.6.5-0.1~deb13u1
3.6.5-0.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34873.json"

Debian:14 / mbedtls

Package

Name
mbedtls
Purl
pkg:deb/debian/mbedtls?arch=source

Affected ranges

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

Affected versions

3.*
3.6.4-2
3.6.5-0.1~deb13u1
3.6.5-0.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34873.json"