CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-34872

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).

Exploit prediction scoring system (EPSS) score

EPSS Score 0.0

EPSS Ranking 5.7%

CVSS Severity

CVSS v3 Score 9.1

References

Products affected by CVE-2026-34872

Arm » Mbed Tls » Version: N/A

cpe:2.3:a:arm:mbed_tls:-
Arm » Mbed Tls » Version: 1.3.0

cpe:2.3:a:arm:mbed_tls:1.3.0
Arm » Mbed Tls » Version: 1.3.1

cpe:2.3:a:arm:mbed_tls:1.3.1
Arm » Mbed Tls » Version: 1.3.10

cpe:2.3:a:arm:mbed_tls:1.3.10
Arm » Mbed Tls » Version: 1.3.11

cpe:2.3:a:arm:mbed_tls:1.3.11
Arm » Mbed Tls » Version: 1.3.12

cpe:2.3:a:arm:mbed_tls:1.3.12
Arm » Mbed Tls » Version: 1.3.13

cpe:2.3:a:arm:mbed_tls:1.3.13
Arm » Mbed Tls » Version: 1.3.14

cpe:2.3:a:arm:mbed_tls:1.3.14
Arm » Mbed Tls » Version: 1.3.15

cpe:2.3:a:arm:mbed_tls:1.3.15
Arm » Mbed Tls » Version: 1.3.16

cpe:2.3:a:arm:mbed_tls:1.3.16
Arm » Mbed Tls » Version: 1.3.17

cpe:2.3:a:arm:mbed_tls:1.3.17
Arm » Mbed Tls » Version: 1.3.18

cpe:2.3:a:arm:mbed_tls:1.3.18
Arm » Mbed Tls » Version: 1.3.19

cpe:2.3:a:arm:mbed_tls:1.3.19
Arm » Mbed Tls » Version: 1.3.2

cpe:2.3:a:arm:mbed_tls:1.3.2
Arm » Mbed Tls » Version: 1.3.20

cpe:2.3:a:arm:mbed_tls:1.3.20
Arm » Mbed Tls » Version: 1.3.21

cpe:2.3:a:arm:mbed_tls:1.3.21
Arm » Mbed Tls » Version: 1.3.22

cpe:2.3:a:arm:mbed_tls:1.3.22
Arm » Mbed Tls » Version: 1.3.3

cpe:2.3:a:arm:mbed_tls:1.3.3
Arm » Mbed Tls » Version: 1.3.4

cpe:2.3:a:arm:mbed_tls:1.3.4
Arm » Mbed Tls » Version: 1.3.5

cpe:2.3:a:arm:mbed_tls:1.3.5
Arm » Mbed Tls » Version: 1.3.6

cpe:2.3:a:arm:mbed_tls:1.3.6
Arm » Mbed Tls » Version: 1.3.7

cpe:2.3:a:arm:mbed_tls:1.3.7
Arm » Mbed Tls » Version: 1.3.8

cpe:2.3:a:arm:mbed_tls:1.3.8
Arm » Mbed Tls » Version: 1.3.9

cpe:2.3:a:arm:mbed_tls:1.3.9
Arm » Mbed Tls » Version: 2.0.0

cpe:2.3:a:arm:mbed_tls:2.0.0
Arm » Mbed Tls » Version: 2.1.0

cpe:2.3:a:arm:mbed_tls:2.1.0
Arm » Mbed Tls » Version: 2.1.1

cpe:2.3:a:arm:mbed_tls:2.1.1
Arm » Mbed Tls » Version: 2.1.10

cpe:2.3:a:arm:mbed_tls:2.1.10
Arm » Mbed Tls » Version: 2.1.11

cpe:2.3:a:arm:mbed_tls:2.1.11
Arm » Mbed Tls » Version: 2.1.12

cpe:2.3:a:arm:mbed_tls:2.1.12
Arm » Mbed Tls » Version: 2.1.13

cpe:2.3:a:arm:mbed_tls:2.1.13
Arm » Mbed Tls » Version: 2.1.14

cpe:2.3:a:arm:mbed_tls:2.1.14
Arm » Mbed Tls » Version: 2.1.15

cpe:2.3:a:arm:mbed_tls:2.1.15
Arm » Mbed Tls » Version: 2.1.16

cpe:2.3:a:arm:mbed_tls:2.1.16
Arm » Mbed Tls » Version: 2.1.17

cpe:2.3:a:arm:mbed_tls:2.1.17
Arm » Mbed Tls » Version: 2.1.18

cpe:2.3:a:arm:mbed_tls:2.1.18
Arm » Mbed Tls » Version: 2.1.2

cpe:2.3:a:arm:mbed_tls:2.1.2
Arm » Mbed Tls » Version: 2.1.3

cpe:2.3:a:arm:mbed_tls:2.1.3
Arm » Mbed Tls » Version: 2.1.4

cpe:2.3:a:arm:mbed_tls:2.1.4
Arm » Mbed Tls » Version: 2.1.5

cpe:2.3:a:arm:mbed_tls:2.1.5
Arm » Mbed Tls » Version: 2.1.6

cpe:2.3:a:arm:mbed_tls:2.1.6
Arm » Mbed Tls » Version: 2.1.7

cpe:2.3:a:arm:mbed_tls:2.1.7
Arm » Mbed Tls » Version: 2.1.8

cpe:2.3:a:arm:mbed_tls:2.1.8
Arm » Mbed Tls » Version: 2.1.9

cpe:2.3:a:arm:mbed_tls:2.1.9
Arm » Mbed Tls » Version: 2.10.0

cpe:2.3:a:arm:mbed_tls:2.10.0
Arm » Mbed Tls » Version: 2.11.0

cpe:2.3:a:arm:mbed_tls:2.11.0
Arm » Mbed Tls » Version: 2.12.0

cpe:2.3:a:arm:mbed_tls:2.12.0
Arm » Mbed Tls » Version: 2.13.0

cpe:2.3:a:arm:mbed_tls:2.13.0
Arm » Mbed Tls » Version: 2.13.1

cpe:2.3:a:arm:mbed_tls:2.13.1
Arm » Mbed Tls » Version: 2.14.0

cpe:2.3:a:arm:mbed_tls:2.14.0
Arm » Mbed Tls » Version: 2.14.1

cpe:2.3:a:arm:mbed_tls:2.14.1
Arm » Mbed Tls » Version: 2.15.0

cpe:2.3:a:arm:mbed_tls:2.15.0
Arm » Mbed Tls » Version: 2.15.1

cpe:2.3:a:arm:mbed_tls:2.15.1
Arm » Mbed Tls » Version: 2.16.0

cpe:2.3:a:arm:mbed_tls:2.16.0
Arm » Mbed Tls » Version: 2.16.1

cpe:2.3:a:arm:mbed_tls:2.16.1
Arm » Mbed Tls » Version: 2.16.10

cpe:2.3:a:arm:mbed_tls:2.16.10
Arm » Mbed Tls » Version: 2.16.11

cpe:2.3:a:arm:mbed_tls:2.16.11
Arm » Mbed Tls » Version: 2.16.12

cpe:2.3:a:arm:mbed_tls:2.16.12
Arm » Mbed Tls » Version: 2.16.2

cpe:2.3:a:arm:mbed_tls:2.16.2
Arm » Mbed Tls » Version: 2.16.3

cpe:2.3:a:arm:mbed_tls:2.16.3
Arm » Mbed Tls » Version: 2.16.4

cpe:2.3:a:arm:mbed_tls:2.16.4
Arm » Mbed Tls » Version: 2.16.5

cpe:2.3:a:arm:mbed_tls:2.16.5
Arm » Mbed Tls » Version: 2.16.6

cpe:2.3:a:arm:mbed_tls:2.16.6
Arm » Mbed Tls » Version: 2.16.7

cpe:2.3:a:arm:mbed_tls:2.16.7
Arm » Mbed Tls » Version: 2.16.8

cpe:2.3:a:arm:mbed_tls:2.16.8
Arm » Mbed Tls » Version: 2.16.9

cpe:2.3:a:arm:mbed_tls:2.16.9
Arm » Mbed Tls » Version: 2.17.0

cpe:2.3:a:arm:mbed_tls:2.17.0
Arm » Mbed Tls » Version: 2.18.0

cpe:2.3:a:arm:mbed_tls:2.18.0
Arm » Mbed Tls » Version: 2.18.1

cpe:2.3:a:arm:mbed_tls:2.18.1
Arm » Mbed Tls » Version: 2.19.0

cpe:2.3:a:arm:mbed_tls:2.19.0
Arm » Mbed Tls » Version: 2.19.1

cpe:2.3:a:arm:mbed_tls:2.19.1
Arm » Mbed Tls » Version: 2.2.0

cpe:2.3:a:arm:mbed_tls:2.2.0
Arm » Mbed Tls » Version: 2.2.1

cpe:2.3:a:arm:mbed_tls:2.2.1
Arm » Mbed Tls » Version: 2.2.2

cpe:2.3:a:arm:mbed_tls:2.2.2
Arm » Mbed Tls » Version: 2.2.3

cpe:2.3:a:arm:mbed_tls:2.2.3
Arm » Mbed Tls » Version: 2.20.0

cpe:2.3:a:arm:mbed_tls:2.20.0
Arm » Mbed Tls » Version: 2.21.0

cpe:2.3:a:arm:mbed_tls:2.21.0
Arm » Mbed Tls » Version: 2.22.0

cpe:2.3:a:arm:mbed_tls:2.22.0
Arm » Mbed Tls » Version: 2.23.0

cpe:2.3:a:arm:mbed_tls:2.23.0
Arm » Mbed Tls » Version: 2.24.0

cpe:2.3:a:arm:mbed_tls:2.24.0
Arm » Mbed Tls » Version: 2.25.0

cpe:2.3:a:arm:mbed_tls:2.25.0
Arm » Mbed Tls » Version: 2.26.0

cpe:2.3:a:arm:mbed_tls:2.26.0
Arm » Mbed Tls » Version: 2.27.0

cpe:2.3:a:arm:mbed_tls:2.27.0
Arm » Mbed Tls » Version: 2.28.0

cpe:2.3:a:arm:mbed_tls:2.28.0
Arm » Mbed Tls » Version: 2.28.1

cpe:2.3:a:arm:mbed_tls:2.28.1
Arm » Mbed Tls » Version: 2.28.10

cpe:2.3:a:arm:mbed_tls:2.28.10
Arm » Mbed Tls » Version: 2.28.2

cpe:2.3:a:arm:mbed_tls:2.28.2
Arm » Mbed Tls » Version: 2.28.3

cpe:2.3:a:arm:mbed_tls:2.28.3
Arm » Mbed Tls » Version: 2.28.4

cpe:2.3:a:arm:mbed_tls:2.28.4
Arm » Mbed Tls » Version: 2.28.5

cpe:2.3:a:arm:mbed_tls:2.28.5
Arm » Mbed Tls » Version: 2.28.6

cpe:2.3:a:arm:mbed_tls:2.28.6
Arm » Mbed Tls » Version: 2.28.7

cpe:2.3:a:arm:mbed_tls:2.28.7
Arm » Mbed Tls » Version: 2.28.8

cpe:2.3:a:arm:mbed_tls:2.28.8
Arm » Mbed Tls » Version: 2.28.9

cpe:2.3:a:arm:mbed_tls:2.28.9
Arm » Mbed Tls » Version: 2.3.0

cpe:2.3:a:arm:mbed_tls:2.3.0
Arm » Mbed Tls » Version: 2.3.1

cpe:2.3:a:arm:mbed_tls:2.3.1
Arm » Mbed Tls » Version: 2.3.2

cpe:2.3:a:arm:mbed_tls:2.3.2
Arm » Mbed Tls » Version: 2.4.0

cpe:2.3:a:arm:mbed_tls:2.4.0
Arm » Mbed Tls » Version: 2.4.1

cpe:2.3:a:arm:mbed_tls:2.4.1
Arm » Mbed Tls » Version: 2.4.2

cpe:2.3:a:arm:mbed_tls:2.4.2
Arm » Mbed Tls » Version: 2.5.0

cpe:2.3:a:arm:mbed_tls:2.5.0
Arm » Mbed Tls » Version: 2.5.1

cpe:2.3:a:arm:mbed_tls:2.5.1
Arm » Mbed Tls » Version: 2.6.0

cpe:2.3:a:arm:mbed_tls:2.6.0
Arm » Mbed Tls » Version: 2.6.1

cpe:2.3:a:arm:mbed_tls:2.6.1
Arm » Mbed Tls » Version: 2.7.0

cpe:2.3:a:arm:mbed_tls:2.7.0
Arm » Mbed Tls » Version: 2.7.1

cpe:2.3:a:arm:mbed_tls:2.7.1
Arm » Mbed Tls » Version: 2.7.10

cpe:2.3:a:arm:mbed_tls:2.7.10
Arm » Mbed Tls » Version: 2.7.11

cpe:2.3:a:arm:mbed_tls:2.7.11
Arm » Mbed Tls » Version: 2.7.12

cpe:2.3:a:arm:mbed_tls:2.7.12
Arm » Mbed Tls » Version: 2.7.13

cpe:2.3:a:arm:mbed_tls:2.7.13
Arm » Mbed Tls » Version: 2.7.14

cpe:2.3:a:arm:mbed_tls:2.7.14
Arm » Mbed Tls » Version: 2.7.15

cpe:2.3:a:arm:mbed_tls:2.7.15
Arm » Mbed Tls » Version: 2.7.16

cpe:2.3:a:arm:mbed_tls:2.7.16
Arm » Mbed Tls » Version: 2.7.17

cpe:2.3:a:arm:mbed_tls:2.7.17
Arm » Mbed Tls » Version: 2.7.18

cpe:2.3:a:arm:mbed_tls:2.7.18
Arm » Mbed Tls » Version: 2.7.19

cpe:2.3:a:arm:mbed_tls:2.7.19
Arm » Mbed Tls » Version: 2.7.2

cpe:2.3:a:arm:mbed_tls:2.7.2
Arm » Mbed Tls » Version: 2.7.3

cpe:2.3:a:arm:mbed_tls:2.7.3
Arm » Mbed Tls » Version: 2.7.4

cpe:2.3:a:arm:mbed_tls:2.7.4
Arm » Mbed Tls » Version: 2.7.5

cpe:2.3:a:arm:mbed_tls:2.7.5
Arm » Mbed Tls » Version: 2.7.6

cpe:2.3:a:arm:mbed_tls:2.7.6
Arm » Mbed Tls » Version: 2.7.7

cpe:2.3:a:arm:mbed_tls:2.7.7
Arm » Mbed Tls » Version: 2.7.8

cpe:2.3:a:arm:mbed_tls:2.7.8
Arm » Mbed Tls » Version: 2.7.9

cpe:2.3:a:arm:mbed_tls:2.7.9
Arm » Mbed Tls » Version: 2.8.0

cpe:2.3:a:arm:mbed_tls:2.8.0
Arm » Mbed Tls » Version: 2.9.0

cpe:2.3:a:arm:mbed_tls:2.9.0
Arm » Mbed Tls » Version: 3.0.0

cpe:2.3:a:arm:mbed_tls:3.0.0
Arm » Mbed Tls » Version: 3.1.0

cpe:2.3:a:arm:mbed_tls:3.1.0
Arm » Mbed Tls » Version: 3.2.0

cpe:2.3:a:arm:mbed_tls:3.2.0
Arm » Mbed Tls » Version: 3.2.1

cpe:2.3:a:arm:mbed_tls:3.2.1
Arm » Mbed Tls » Version: 3.3.0

cpe:2.3:a:arm:mbed_tls:3.3.0
Arm » Mbed Tls » Version: 3.4.0

cpe:2.3:a:arm:mbed_tls:3.4.0
Arm » Mbed Tls » Version: 3.4.1

cpe:2.3:a:arm:mbed_tls:3.4.1
Arm » Mbed Tls » Version: 3.5.0

cpe:2.3:a:arm:mbed_tls:3.5.0
Arm » Mbed Tls » Version: 3.5.1

cpe:2.3:a:arm:mbed_tls:3.5.1
Arm » Mbed Tls » Version: 3.5.2

cpe:2.3:a:arm:mbed_tls:3.5.2
Arm » Mbed Tls » Version: 3.6.0

cpe:2.3:a:arm:mbed_tls:3.6.0
Arm » Mbed Tls » Version: 3.6.1

cpe:2.3:a:arm:mbed_tls:3.6.1
Arm » Mbed Tls » Version: 3.6.2

cpe:2.3:a:arm:mbed_tls:3.6.2
Arm » Mbed Tls » Version: 3.6.3

cpe:2.3:a:arm:mbed_tls:3.6.3
Arm » Mbed Tls » Version: 3.6.4

cpe:2.3:a:arm:mbed_tls:3.6.4
Arm » Mbed Tls » Version: 3.6.5

cpe:2.3:a:arm:mbed_tls:3.6.5
Arm » Tf-Psa-Crypto » Version: 1.0.0

cpe:2.3:a:arm:tf-psa-crypto:1.0.0

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-34872

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