Improper Verification of Cryptographic Signature Affecting armmbed/mbedtls package, versions [,3.6.6)
Threat Intelligence
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The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-ARMMBEDMBEDTLS-15929049
- published8 Apr 2026
- disclosed1 Apr 2026
- creditEva Crystal
Introduced: 1 Apr 2026
CVE-2026-34872 (opens in a new tab)How to fix?
Upgrade armmbed/mbedtls to version 3.6.6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature while doing key agreement with PSA_ALG_FFDH. An attacker can influence the shared secret to a small, predictable set of values by sending crafted public keys during key exchange.