Vulnerability in Qax-Os Excelize
CVE-2026-107216
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.8.1 to 2.11.0, ANCHORARRAY recursively calls the exported CalcCellValue function, creating a fresh calculation context at each cycle and bypassing in-flight and iteration controls. ANCHORARRAY calls CalcCellValue instead of cellResolver, so each recursive hop receives a new calcContext and loses cycle state. When mutually referencing dynamic-array formulas are evaluated directly or through formula-evaluating APIs, each recursion hop resets the cycle budget and prevents completion-based caches from breaking the cycle, allowing an attacker to cause a fatal Go stack overflow and abort the process. No fixed version is available as of this review.
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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Qax-Os Excelize — versions >= 2.8.1, <= 2.11.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107216?
- CVE-2026-107216 is a high-severity vulnerability in Qax-Os Excelize, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-10-07.
- How severe is CVE-2026-107216?
- High severity. CVSS v3 base score is 7.5 out of 10.