Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen.
Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the most likely result is a crash and a Denial of Service.
An internal helper function called from X509_VERIFY_PARAM_[set|add]_email() used a wrong length when validating the local part of an email address. This could cause the 64 octet limit on the local part of an email address to be not enforced, or cause an out of bound read and potentially a crash.
The bug is reachable via S-MIME validation with a crafted From: address supplied in an email message that can potentially cause a crash.
No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary.
CVSS Details
- CVSS 3.1 Base Score: 6.2
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade openssl40Upgrade openssl36Upgrade openssl35Upgrade openssl34Upgrade FreeBSDUpgrade opensslUpgrade openssl111 | Jun 15, 2026 | Jun 10, 2026 |
| Http Openssl | — | Upgrade to the latest version of OpenSSL | Jun 10, 2026 | Jun 9, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jul 10, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub