CVE-2026-26824

June 4, 2026, 6:41 p.m.

6.5
Medium

Description

libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file

Product(s) Impacted

Vendor Product Versions
Libxls Project
  • Libxls
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-457
Use of Uninitialized Variable
The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a libxls_project libxls / / / / / / / /

References

https://github.com/libxls/libxls/issues/155
https://github.com/libxls/libxls/issues/155

Tags

[email protected]
CWE-457
2026-06-03
CVE-2026-26824

CVSS Score

6.5 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: LOW
  • Integrity Impact: NONE
  • Availability Impact: LOW

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

    View Vector String

Timeline

Published: June 3, 2026, 8:16 p.m.
Last Modified: June 4, 2026, 6:41 p.m.

Status : Analyzed

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.