CVE-2026-5194
wolfSSL ECDSA Certificate Verification
Description
Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.
INFO
Published Date :
April 9, 2026, 8:16 p.m.
Last Modified :
May 23, 2026, 11:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 50d2cd11-d01a-48ed-9441-5bfce9d63b27 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Ensure signature verification functions check hash/digest sizes.
- Verify OIDs are appropriate for the key type.
- Update ECDSA/ECC verification logic.
- Disable EdDSA/ML-DSA if not needed.
Public PoC/Exploit Available at Github
CVE-2026-5194 has a 7 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5194.
| URL | Resource |
|---|---|
| https://github.com/wolfSSL/wolfssl/pull/10131 | Issue Tracking |
| https://www.anthropic.com/research/glasswing-initial-update |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5194 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5194
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Open project that helps organizations and individuals move from concern to preparedness in the age of advanced AI.
deception mit open-source security tripwire post-intrusion
Python
None
CMake C++ Shell C Makefile Batchfile Linker Script Perl FreeMarker Objective-C
None
Tracking Vulnerabilities That Appear to be Credited to the Anthropic Research Team
PoC: identify silent security patches before CVE
Makefile Rust
Embedded Device Security Assessment Framework — 700 modules, 350 CVEs, 55 vendors, APT Group Engine. Covers routers, IP cameras, GPON ONTs, ISP CPEs, IoT/embedded edge.
automation cve ethical-hacking exploit framework gpon iot network-security pentesting python red-team router routersploit security vulnerability-scanner apt apt28 mikrotik tp-link dns-hijack
Makefile Python Lua
The wolfSSL library is a small, fast, portable implementation of TLS/SSL for embedded devices to the cloud. wolfSSL supports up to TLS 1.3 and DTLS 1.3! Update to wolfSSL 5.9.1 for the latest CVE fixes.
ssl tls cryptography security openssl tls13 dtls https fips cryptography-api embedded-systems encryption iot trusted-execution-environment openssl-alternative c-library wolfssl cipher-suites openssl-api sniffer
C Shell Makefile Tcl Assembly C++ XS Perl C# M4
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5194 vulnerability anywhere in the article.
-
The Hacker News
Claude Mythos AI Finds 10,000 High-Severity Flaws in Widely Used Software
Anthropic on Friday disclosed that Project Glasswing has helped uncover more than 10,000 high- or critical-severity vulnerabilities across some of the most "systemically" important software across the ... Read more
-
CybersecurityNews
Anthropic’s Claude Mythos Preview Uncovers 10,000+ 0-Days in Project Glasswing
Anthropic has revealed the staggering initial results of Project Glasswing, a collaborative cybersecurity initiative designed to secure critical infrastructure using advanced AI before malicious actor ... Read more
-
Daily CyberSecurity
Critical wolfSSL Flaw Could Allow Attackers to Spoof Trusted Hosts
In the world of embedded systems and resource-constrained environments, wolfSSL (formerly CyaSSL) is the lightweight champion of security. Known for its small footprint—up to 20 times smaller than Ope ... Read more
-
Daily CyberSecurity
CISA Adds 7 Fresh Exploits to KEV Catalog
The Cybersecurity and Infrastructure Security Agency (CISA) has expanded its Known Exploited Vulnerabilities (KEV) Catalog, adding seven high-risk flaws that are currently being weaponized by maliciou ... Read more
-
The Hacker News
⚡ Weekly Recap: Fiber Optic Spying, Windows Rootkit, AI Vulnerability Hunting and More
Monday is back, and the weekend’s backlog of chaos is officially hitting the fan. We are tracking a critical zero-day that has been quietly living in your PDFs for months, plus some aggressive state-s ... Read more
The following table lists the changes that have been made to the
CVE-2026-5194 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 23, 2026
Action Type Old Value New Value Added Reference https://www.anthropic.com/research/glasswing-initial-update -
Initial Analysis by [email protected]
Apr. 16, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* versions from (including) 3.12.0 up to (excluding) 5.9.1 Added Reference Type wolfSSL Inc.: https://github.com/wolfSSL/wolfssl/pull/10131 Types: Issue Tracking -
New CVE Received by [email protected]
Apr. 09, 2026
Action Type Old Value New Value Added Description Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:L/SA:L/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:Red Added CWE CWE-295 Added Reference https://github.com/wolfSSL/wolfssl/pull/10131