CVE-2026-26825

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-26825
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26825.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-26825
Downstream
Published
2026-06-03T00:00:00Z
Modified
2026-08-12T03:51:33Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

A use-of-uninitialized memory vulnerability exists in libxls 1.6.3 when parsing malformed XLS files. The issue is reachable via xls_parseWorkBook() and is triggered by uninitialized heap memory originating from the OLE layer (ole2_read). The flaw is detectable with MemorySanitizer (MSAN) and can lead to undefined behavior, incorrect parsing logic, or potential information disclosure.

Database specific 
{
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26825.json"
}
References

Affected packages

Git / github.com/libxls/libxls

Affected ranges

Type
GIT
Repo
https://github.com/libxls/libxls
Events
Introduced
c199d132494833da696b58aa4acf3fc5a36d930b
Last Affected
c199d132494833da696b58aa4acf3fc5a36d930b
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:libxls_project:libxls:1.6.3:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.6.3"
        },
        {
            "last_affected": "1.6.3"
        }
    ],
    "source": "CPE_STRING"
}

Affected versions

1.*
1.6.3
v1.*
v1.6.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26825.json"