Resource exhaustion in Excelize
CVE-2026-59161
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the streaming worksheet reader used by Rows and GetRows does not enforce the TotalRows limit on the row r attribute, allowing a small XLSX file with a row number above 1048576 and no cell coordinate to make GetRows append empty rows up to the attacker-controlled index and consume excessive memory and CPU. This issue is fixed in version 2.11.0.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Excelize
- Qax-Os Excelize — versions < 2.11.0
Weakness classification (CWE)
References
- github.com/qax-os/excelize/security/advisories/GHSA-q5j5-6p94-4gwc (Exploit, Vendor Advisory)
- github.com/qax-os/excelize/pull/2331 (Patch, Issue Tracking)
- github.com/qax-os/excelize/commit/93f0b3caed37f21ef5079e3259c6c21dcfe68453 (Patch)
- github.com/qax-os/excelize/releases/tag/v2.11.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-59161?
- CVE-2026-59161 is a high-severity vulnerability in Excelize, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-07-10.
- How severe is CVE-2026-59161?
- High severity. CVSS v3 base score is 7.5 out of 10.