DEBIAN-CVE-2026-34872
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-34872
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34872.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-34872
- Upstream
- Published
- 2026-04-01T20:16:27.493Z
- Modified
- 2026-04-02T13:31:37.982749Z
- 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.x and 3.6.x through 3.6.5 and TF-PSA-Crypto 1.0. There is a lack of contributory behavior in FFDH due to improper input validation. Using finite-field Diffie-Hellman, the other party can force the shared secret into a small set of values (lack of contributory behavior). This is a problem for protocols that depend on contributory behavior (which is not the case for TLS). The attack can be carried by the peer, or depending on the protocol by an active network attacker (person in the middle).
- References
Affected packages
Debian:11 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown 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
Debian:12 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
Debian:13 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source
Debian:14 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source