CVE-2026-107214: excelize — Exploit & Fix

Description

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, the decryption dispatch performs insufficient structural and parameter validation before standard and agile decryptors slice, index, allocate, and divide using attacker-controlled values. Decrypt passes attacker-controlled EncryptionInfo and EncryptedPackage data into standardDecrypt or agileDecrypt before validating the structures used by those routines. When a malformed OLE compound file with a version-valid EncryptionInfo stream is opened or passed to Decrypt, nine malformed-input classes reach unrecovered Go runtime panics instead of the documented error path, allowing an attacker to terminate the calling process. No fixed version is available as of this review.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0024

Probability of exploitation

0.15%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-248 CWE-248

Affected Products

Vendor	Product	Versions
excelize	excelize	2.3.1 — 2.11.0

References

Advisories & Patches

https://github.com/qax-os/excelize/commit/22f76f9acb94b85b3eb9c4365ab4f750cebbc565 https://github.com/qax-os/excelize/pull/2395 https://github.com/qax-os/excelize/security/advisories/GHSA-2j4c-ffch-9f23 https://github.com/qax-os/excelize/security/advisories/GHSA-2j4c-ffch-9f23

Exploits

https://github.com/qax-os/excelize/security/advisories/GHSA-2j4c-ffch-9f23 https://github.com/qax-os/excelize/security/advisories/GHSA-2j4c-ffch-9f23

Frequently Asked Questions

What is CVE-2026-107214? +

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, the decryption dispatch performs insufficient structural and parameter validation before standard and agile decryptors slice, index, allocate, and divide using attacker-controlled values. Decrypt passes attacker-controlled EncryptionInfo and EncryptedPackage data into standardDecrypt or agileDecrypt before validating the structures used by those routines. When a malformed OLE compound file with a version-valid EncryptionInfo stream is opened or passed to Decrypt, nine malformed-input classes reach unrecovered Go runtime panics instead of the documented error path, allowing an attacker to terminate the calling process. No fixed version is available as of this review. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-107214? +

CVE-2026-107214 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0024, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-107214? +

CVE-2026-107214 affects products from excelize, specifically: excelize. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-107214? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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