VulnSocial

CVE-2026-34872Disclosure(arm / mbed_tls)

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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).

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0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-347

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • mbed_tls
  • tf-psa-crypto

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
arm
Products
mbed_tlstf-psa-crypto

1 version affected across 2 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-04-02: 1Technical Details · 2026-04-02: 104-02
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • The Hacker Wire@TheHackerWire
    Disclosure

    🔴 CVE-2026-34872 - Critical 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-fi... https://www.thehackerwire.com/vulnerability/CVE-2026-34872/ https://t.co/eGuQerO9zi

    Post summary

    CVE‑2026‑34872 is disclosed as a critical vulnerability in Mbed TLS and TF‑PSA‑Crypto, caused by improper input validation in FFDH; no PoC, exploit, or patch details are provided.

    0000072
    163 followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Apparmmbed_tls---
Apparmtf-psa-crypto1.0.0--

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