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Advisory record · GHSA-j2w7-387v-m2rq

PhpSpreadsheet ODS Reader: Unbounded number-rows-repeated → CPU & Memory Exhaustion (DoS)

CVSS 8.7 HighEPSS 0.0066 · 51st percentile

Published by the GitHub Advisory Database at 27 Oct 2026, 15:38 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
phpoffice/phpspreadsheetPackagist>=4.0.0, <5.10.0 || >=3.3.0, <3.10.8 || >=2.2.0, <2.4.8 || >=2.0.0, <2.1.19 || <1.30.75.10.0, 3.10.8, 2.4.8, 2.1.19, 1.30.7
Identifiers
GHSA-j2w7-387v-m2rq · CVE-2026-108359 · PKSA-dxd5-wy68-pq29
Weakness (CWE)
CWE-400 · CWE-789
Tags
Published
27 Oct 2026
Updated
27 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-j2w7-387v-m2rq affects PhpSpreadsheet, an ODS reader issue where the number-rows-repeated attribute is not bounded, so a small crafted .ods file can make the reader create a very large number of cells. Affected versions are listed as below 1.30.7, from 2.0.0 to below 2.1.19, from 2.2.0 to below 2.4.8, from 3.3.0 to below 3.10.8, and from 4.0.0 to below 5.10.0. An attacker only needs an application to load a user-supplied .ods file, which can exhaust memory and cause a denial of service. Upgrade to 1.30.7, 2.1.19, 2.4.8, 3.10.8, or 5.10.0, depending on your branch.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0066, the 51st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:53 UTC First seen by agentprime
  2. 31 Oct 2026, 13:53 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.