Quick answers
- Is CVE-2026-110926 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-110926 being exploited in the wild.
- How severe is CVE-2026-110926?
- Medium severity, with a CVSS score of 5.3, published 15 October 2026.
- Which products and versions are affected?
- OpenSSH OpenSSH.
- Is there a fix for CVE-2026-110926?
- 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-2026-110926 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-110926?
- Check whether you run OpenSSH. 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
When compression is negotiated in OpenSSH, multiple channels on the same connection share an LZ77 compression dictionary. An authenticated peer with write access to one channel can recover plaintext from another channel on the same connection through a chosen-plaintext attack exploiting compression length side channels. This is a cross-channel information disclosure vulnerability in the compression layer.
Affected products
- OpenSSH OpenSSH
Timeline
- 2026-10-15: disclosed