Vulnerability · Published Oct 7, 2026 · Assigned by GitHub_M
CVE-2026-107214Excelize Decrypt: unrecoverable panics on malformed OLE/CFB encrypted workbooks
High 7.5
In plain English
A high-severity security flaw in excelize from qax-os. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/360EntSecGroup-Skylar/excelize/v2 | no fix listed | GO-2026-6684 |
| Go | github.com/xuri/excelize/v2 | 2.11.1-0.20260915055537-22f76f9acb94 | GHSA-2j4c-ffch-9f23 |
| Go | github.com/xuri/excelize/v2 | 2.11.1-0.20260915055537-22f76f9acb94 | GO-2026-6684 |
Affected products (as reported)
Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/qax-os/excelize/security/advisories/GHSA-2j4c-ffch-9f23 x_refsource_CONFIRM
- https://github.com/qax-os/excelize/pull/2395 x_refsource_MISC
- https://github.com/qax-os/excelize/commit/22f76f9acb94b85b3eb9c4365ab4f750cebbc565 x_refsource_MISC