CVE-2026-3230 (GCVE-0-2026-3230)

Vulnerability from cvelistv5 – Published: 2026-03-19 20:59 – Updated: 2026-03-19 20:59
VLAI?
Title
Improper key_share validation in TLS 1.3 HelloRetryRequest
Summary
Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client's authentication of the server during TLS handshakes.
Severity ?
1.2 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:Y/R:A/V:D/U:Clear
CWE
  • CWE-20 - Improper Input Validation Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 0 , < 5.9.0 (semver)
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Credits
Jaehun Lee, Pohang University of Science and Technology (POSTECH) Kyungmin Bae, Pohang University of Science and Technology (POSTECH)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.