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VulnerabilityCVE-2026-5446Published 2026-04-09

CVE-2026-5446 — wolfSSL

medium (derived)Public exploit1 PoC repo

As of 2026-04-10, CVE-2026-5446 is a Medium-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in wolfSSL, CVSS v4.0 6, EPSS 0.3% (21.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-5446, most recently “Anthropic OSS Scanner: Free AI-Driven Vulnerability Scanning for Open-Source Projects (29,000+ Candidate Vulnerabilities Found)”.

CVSS v4.0
6/10Medium (derived)
EPSS
0.3%Higher than 21.1% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
5.8/10Threadlinqs triage score
Published
Updated 2026-04-10
CVSS v4.0 6 (Medium, derived from score) · EPSS 0.3% (higher than 21.1% of all scored CVEs) · Priority 5.8/10 · Published 2026-04-09

Last updated:

What is CVE-2026-5446?

In wolfSSL, ARIA-GCM cipher suites used in TLS 1.2 and DTLS 1.2 reuse an identical 12-byte GCM nonce for every application-data record. Because wc_AriaEncrypt is stateless and passes the caller-supplied IV verbatim to the MagicCrypto SDK with no internal counter, and because the explicit IV is zero-initialized at session setup and never incremented in non-FIPS builds. This vulnerability affects wolfSSL builds configured with --enable-aria and the proprietary MagicCrypto SDK (a non-default, opt-in configuration required for Korean regulatory deployments). AES-GCM is not affected because wc_AesGcmEncrypt_ex maintains an internal invocation counter independently of the call-site guard.

The record classifies CVE-2026-5446 under weakness class CWE-323. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 184 days ago.

Severity and exploitation probability

CVSS v4.0 base score
6 — Medium (derived from score)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS (FIRST)
0.3% probability of exploitation in the next 30 days, higher than 21.1% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
5.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-04-09, last modified 2026-04-10

Is CVE-2026-5446 being exploited?

Weaponised exploit code for CVE-2026-5446 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 18 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-5446

No vendor patch reference has been recorded for CVE-2026-5446 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-5446

1 tracked threat in the Threadlinqs corpus references CVE-2026-5446, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .

Other references