# CVE-2026-5446 — wolfSSL

> 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)”.

**Last updated:** 2026-04-10

## 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](https://cwe.mitre.org/data/definitions/323.html). 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.

- [trickest/cve](https://github.com/trickest/cve/blob/main/2026/CVE-2026-5446.md) (trickest)

## Affected products and versions

- [wolfSSL](https://intel.threadlinqs.com/vendors/wolfssl): wolfSSL

## 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.

- [Anthropic OSS Scanner: Free AI-Driven Vulnerability Scanning for Open-Source Projects (29,000+ Candidate Vulnerabilities Found)](https://intel.threadlinqs.com/threat/TL-2026-3165) — INFO · 2026-10-09

## Sources

Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [github.com](https://github.com/wolfSSL/wolfssl/pull/10111)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-5446
Full detection coverage and IOCs for threats exploiting CVE-2026-5446 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp