CVE-2026-16458 Timing side-channel in RSA PKCS#1 v1.5 decryption in ocrypto
Attackers can recover plaintexts from RSA PKCS#1 v1.5 decryption via timing side-channel attacks in the ocrypto library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16458?
CVE-2026-16458 is a medium-severity vulnerability in Oberon microsystems AG ocrypto, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.0.0 and prior to 4.0.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.
Which versions are affected by CVE-2026-16458?
How do I fix CVE-2026-16458?
No fix has been published for CVE-2026-16458 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-16458 being exploited?
There is no known exploitation of CVE-2026-16458 in the wild and no public exploit code.
Sources
Also known as GHSA-pfwq-9x97-jv4q.