Is there a patch available for CVE-2026-5448?

Yes, a patch is available for CVE-2026-5448. Update the affected software to the latest version immediately.

CVE-2026-5448

Q: What is the CVSS score of CVE-2026-5448?

CVE-2026-5448 has a CVSS 4.0 base score of 2.3 (Low). CVSS vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Green. EPSS exploitation probability: 0.0%.

EUVD-2026-21233 LOW

Heap-based Buffer Overflow (CWE-122)

2026-04-09 wolfSSL

GHSA-5jqq-xpcr-q3r7

Buffer Overflow Heap Overflow

2.3

CVSS 4.0

CVSS VectorNVD

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Green

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

5.9.1

EUVD ID Assigned

Apr 09, 2026 - 23:31 euvd

EUVD-2026-21233

Analysis Generated

Apr 09, 2026 - 23:31 vuln.today

CVE Published

Apr 09, 2026 - 23:18 nvd

LOW 2.3

DescriptionNVD

X.509 date buffer overflow in wolfSSL_X509_notAfter / wolfSSL_X509_notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS or certificate verify operations in wolfSSL.

AnalysisAI

wolfSSL versions before 5.9.1 contain a heap buffer overflow in the X.509 date parsing functions wolfSSL_X509_notAfter and wolfSSL_X509_notBefore when processing crafted certificates through the compatibility layer API. The vulnerability has a CVSS score of 2.3 with attack vector requiring adjacent network access and persistence, affecting only direct API calls and not standard TLS or certificate verification operations. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-5448 vulnerability details – vuln.today

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