CVE-2026-110600
xlsxio through 0.2.37 NULL Pointer Dereference via Worksheet Relationship Without Id
- State
- Published
- Severity
- 6.8 Medium
- Published
- Oct 14, 2026
- Updated
- Oct 14, 2026
- Reserved
- Oct 14, 2026
Description
xlsxio through 0.2.37 contains a NULL pointer dereference vulnerability in main_sheet_get_sheetfile_expat_callback_element_start() in lib/xlsxio_read.c that allows attackers to crash applications via crafted files. Attackers can supply a .xlsx file whose workbook.xml.rels contains a worksheet Relationship lacking an Id attribute, crashing the process when xlsxioread_sheet_open() is called.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
xlsxiobrechtsanders |
|
References
- https://github.com/brechtsanders/xlsxio/issues/151issue-tracking
- https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866technical-description
- https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-derefthird-party-advisory
- VulnCheck Advisory: xlsxio through 0.2.37 NULL Pointer Dereference via Worksheet Relationship Without Idthird-party-advisory
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