PHPSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion
High-risk advisory
CVE-2026-59932
Summary
PHPSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion
Why it matters
GitHub has published a reviewed security advisory for phpoffice/phpspreadsheet. Prioritize it with other application dependency updates.
Operator check
Check whether phpoffice/phpspreadsheet is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.