CVE-2026-107223CWE-789

CVE-2026-107223

High · published October 7, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
26.9
In the wild
Unconfirmed
What it is

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, flatCols expands file-loaded column ranges without validating Min and Max against the worksheet column limit. SetColWidth reaches flatCols, which expands xlsxCol.Min through xlsxCol.Max without enforcing MaxColumns. When a crafted worksheet supplies an oversized col max attribute and the application invokes a column mutator, flatCols performs a deep copy and append for every attacker-selected column number, allowing an attacker to consume excessive CPU and memory or trigger OOM. No fixed version is available as of this review.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00345 · 26.9th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-10-07T23:17Z
Affected products (1)
ProductVersionsFixed in
excelize/excelize≥ 2.1.0, ≤ 2.11.0—
References (3)
https://github.com/qax-os/excelize/commit/a54c578af309fa81f448143ed2b7a91192cc58a7 · [email protected]https://github.com/qax-os/excelize/pull/2370 · [email protected]https://github.com/qax-os/excelize/security/advisories/GHSA-fq3v-74gv-27gm · [email protected]
EPSS history
Timeline
  • 09 OCT 03:26Z
    EPSS moved — → 0%
    epss
  • 07 OCT 18:48Z
    Excelize: Unbounded <col max> attribute is loaded with no MaxColumns check and expanded per-column by flatCols(), so any column mutator hangs or OOMs the process
    cvelistv5
  • 07 OCT 18:48Z
    Excelize: Unbounded <col max> attribute is loaded with no MaxColumns check and expanded per-column by flatCols(), so any column mutator hangs or OOMs the process
    cvelistv5