Loading vulnerability…
CVE-2026-8357 is a heap-based buffer overflow in LibreOffice Calc's spreadsheet-formula compiler. When Calc opens a spreadsheet containing a very long formula composed of many opening tokens, the parser can allocate its nesting-depth tracking array one element short of the worst-case requirement and write one element beyond the allocation. Fixed versions size the array for the maximum possible nesting depth.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A heap buffer overflow in LibreOffice Calc formula compilation that can permit arbitrary code execution. The referenced Rocky Linux 8 advisory provides security updates for affected LibreOffice packages.
A vendor-confirmed LibreOffice vulnerability report mapped to CVE-2026-8357; the content states it is fixed and patched but provides no technical vulnerability details.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.