CVE-2026-110600
mediumxlsxio 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 al…
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866 disclosure@vulncheck.com
- https://github.com/brechtsanders/xlsxio/issues/151 disclosure@vulncheck.com
- https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/xlsxio-through-0.2.37-null-pointer-dereference-via-wo... disclosure@vulncheck.com
- https://github.com/brechtsanders/xlsxio/issues/151 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref 134c704f-9b21-4f2e-91b3-4a467353bcc0