Apache OpenOffice: Carefully crafted documents could display different data when opened with different programs, instead of being reported as corrupt.

published 2026-11-04 4 d ago modified 2026-11-04 4 d ago also EUVD-2026-116871

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits: 0; none known

A manipulated document opened in Apache OpenOffice 4.1.16 or earlier may allow substituted content to be displayed manipulating the user. Such documents are corrupt and should not be opened. Users are recommended to upgrade to version 4.1.17, which fixes this issue.

Patch / fix

fixed in 1

apache openoffice 4.1.17

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 4 d ago (2026-11-04)

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	1.9	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/S:P/AU:N/R:A/U:Green
CNA	4.0	1.9	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:N/R:A/V:X/RE:X/U:Green
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

Apache Software Foundation Apache OpenOffice

Classification

Weakness

CWE-349 Acceptance of Extraneous Untrusted Data With Trusted Data

References

lists.apache.org /thread.html/drr0ss9wrkq0omlrwjhcm8738pjx3xgd
vendor-advisory, mailing-list
openwall.com /lists/oss-security/2026/11/03/21
mailing-list, third-party-advisory

Sources

CVE List CVE-2026-59263
NVD CVE-2026-59263

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary