CVE-2026-79592 Memory corruption in n/a
An out-of-bounds read in libxls allows attackers to cause denial of service or disclose information via crafted OLE summary offsets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-79592?
CVE-2026-79592 is a high-severity memory corruption vulnerability in n/a, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.
Weakness: CWE-125
Which versions are affected by CVE-2026-79592?
How do I fix CVE-2026-79592?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-79592 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79592 exists.
Sources
Also known as DEBIAN-CVE-2026-79592, GHSA-5w42-gv46-j4rp, UBUNTU-CVE-2026-79592.