PhpSpreadsheet ODS Reader: Unbounded number-rows-repeated → CPU & Memory Exhaustion (DoS)
High-risk advisory
CVE-2026-108359
Summary
PhpSpreadsheet ODS Reader: Unbounded number-rows-repeated → CPU & Memory Exhaustion (DoS)
Why it matters
GitHub has published a reviewed security advisory for phpoffice/phpspreadsheet. Prioritize it with other application dependency updates, especially because EPSS places it in the 35% percentile.
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. CVSS score: 8.7. EPSS probability: 0.4%; percentile: 35%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.