CVE-2023-34795

Name: CVE-2023-34795
Creator: NVD / NIST
Published: 2023-06-16T16:15:09.357+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2023-34795 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. xlsxio v0.1.2 to v0.2.34 was discovered to contain a free of uninitialized pointer in the xlsxioread_sheetlist_close() function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted XLSX file.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

xlsxio v0.1.2 to v0.2.34 was discovered to contain a free of uninitialized pointer in the xlsxioread_sheetlist_close() function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted XLSX file.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.35%

27.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Xlsxio Project	Xlsxio	>= 0.1.2, <= 0.2.34

References

https://github.com/brechtsanders/xlsxio/commit/d653f1604b54532f11b45dca1fa164b4a1f15e2dPatch
https://github.com/brechtsanders/xlsxio/issues/121Exploit, Issue Tracking, Third Party Advisory
https://github.com/xf1les/cve-advisories/blob/main/2023/CVE-2023-34795.mdExploit, Third Party Advisory
https://github.com/brechtsanders/xlsxio/commit/d653f1604b54532f11b45dca1fa164b4a1f15e2dPatch
https://github.com/brechtsanders/xlsxio/issues/121Exploit, Issue Tracking, Third Party Advisory
https://github.com/xf1les/cve-advisories/blob/main/2023/CVE-2023-34795.mdExploit, Third Party Advisory

Timeline

Published: Jun 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-34795?

How severe is CVE-2023-34795?

CVE-2023-34795 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34795?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34795?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST