CVE-2026-110600CWE-476

CVE-2026-110600

Medium · published October 14, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
13.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
6.8 · 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
EPSS
0.00237 · 13.9th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-10-14T19:17Z
References (6)
https://github.com/brechtsanders/xlsxio/blob/0.2.37/lib/xlsxio_read.c#L851-L866 · [email protected]https://github.com/brechtsanders/xlsxio/issues/151 · [email protected]https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref · [email protected]https://www.vulncheck.com/advisories/xlsxio-through-0.2.37-null-pointer-dereference-via-worksheet-relationship-without-id · [email protected]https://github.com/brechtsanders/xlsxio/issues/151 · 134c704f-9b21-4f2e-91b3-4a467353bcc0https://hackmd.io/@haind-pwn/xlsxio-relationship-missing-id-null-deref · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 14:16Z
    xlsxio through 0.2.37 NULL Pointer Dereference via Worksheet Relationship Without Id
    cvelistv5
  • 14 OCT 14:16Z
    xlsxio through 0.2.37 NULL Pointer Dereference via Worksheet Relationship Without Id
    cvelistv5