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CVE Vulnerability Details :

CVE-2026-7531

PUBLISHED

More Info Official Page

Assigner-wolfSSL

Assigner Org ID-50d2cd11-d01a-48ed-9441-5bfce9d63b27

Published At-25 Jun, 2026 | 20:01

Updated At-26 Jun, 2026 | 13:17

▼CVE Numbering Authority (CNA)

Use-after-free in PQC hybrid key-share handling

Use-after-free in PQC hybrid key-share handling. This is an incomplete-fix follow-up to CVE-2026-5460 (released in 5.9.1): a malicious TLS 1.3 server sending a truncated PQC hybrid KeyShare can still trigger the error cleanup path to operate on freed memory.

Affected Products

Vendor

wolfSSL

Product

wolfSSL

Collection URL

https://github.com/wolfSSL/wolfssl

Default Status

unaffected

Versions

Affected

From 5.8.0 through 5.9.1 (semver)

Problem Types

Type	CWE ID	Description
CWE	CWE-416	CWE-416 Use After Free

Type: CWE

CWE ID: CWE-416

Description: CWE-416 Use After Free

Metrics

Version	Base score	Base severity	Vector
4.0	2.3	LOW	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Version: 4.0

Base score: 2.3

Base severity: LOW

Vector:

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Credits

finder

Thai Duong (Calif.io / Anthropic)

References

Hyperlink	Resource
https://github.com/wolfSSL/wolfssl/pull/10327	patch
https://www.wolfssl.com/docs/security-vulnerabilities/	N/A

Hyperlink: https://github.com/wolfSSL/wolfssl/pull/10327

Resource:

patch

Hyperlink: https://www.wolfssl.com/docs/security-vulnerabilities/

Resource: N/A

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

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Affected

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Metrics Other Info

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Replaced By

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Affected Products

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References