VulnerabilityAnalyzed
CVE-2026-26824
libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser.
MEDIUM 6.5EPSS 0.23%
Does this matter?
Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own.
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
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-457
- Affected
- libxls project/libxls
- Source
- cve@mitre.org
References
- https://github.com/libxls/libxls/issues/155Exploit, Issue Tracking
- https://github.com/libxls/libxls/issues/155Exploit, Issue Tracking
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.