CVE-2026-26825

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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

2026-09-25T08:11:22Z

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

Fixed

9adf88f4e3b304e397f70ac189e70776edb6d5a3

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",
        "REFERENCES"
    ]
}

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"

vanir_signatures

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vanir_signatures_modified

"2026-09-25T08:11:22Z"