Quick answers
- Is CVE-2026-84782 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84782 being exploited in the wild.
- How severe is CVE-2026-84782?
- High severity, with a CVSS score of 8.2, published 29 September 2026.
- Which products and versions are affected?
- OpenSSL Unknown.
- Is there a fix for CVE-2026-84782?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-84782 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-84782?
- Check whether you run OpenSSL at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability occurs in DTLS handshake retransmission logic which reuses buffer position tracking without resetting it when a suspended write is interrupted by a retransmission timer event. This causes the retransmission to read from an incorrect offset, potentially past the allocated buffer boundary, or to overwrite shared state needed by the suspended write. An attacker with network access can observe or trigger the condition without authentication.
Affected products
- OpenSSL OpenSSL Unknown
Timeline
- 2026-09-29: disclosed