CVE•Published 2026-03-19•Modified 2026-04-29•1 article on news•6 live references•NVD data
CVE-2026-2646Wolfssl · Wolfssl
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
3
Exploit Prediction Scoring System · top 97% of all CVEs
Weaknesses (CWE)
Description
A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSL_d2i_SSL_SESSION() function. When deserializing session data with SESSION_CERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and corrupt heap memory. A maliciously crafted session would need to be loaded from an external source to trigger this vulnerability. Internal sessions were not vulnerable.
Timeline
Published 2026-03-19
Modified 2026-04-29
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-2646Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Wolfssl Wolfssl"All exposed Wolfssl Wolfssl instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Wolfssl"HTTP body or banner mentions "Wolfssl" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-2646Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-2646Censys host search filtered to this CVE id.
grep.app
CVE-2026-2646Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-2646GitHub code search for direct mentions.
Google dork
"CVE-2026-2646" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.