CVE-2023-34795 json
xlsxio v0.1.2 to v0.2.34 was discovered to contain a free of uninitialized pointer in the xlsxioread_sheetlist_close() function.
published 2023-06-16 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-38836
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 22 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/brechtsanders/xlsxio/issues/121 referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/xf1les/cve-advisories/blob/main/2023/CVE-2023-34795.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
github.com
/brechtsanders/xlsxio/commit/d653f1604b54532f11b45dca1fa164b4a1f15e2d
patch
-
github.com
/brechtsanders/xlsxio/issues/121
exploit, issue-tracking, third-party-advisory
-
github.com
/xf1les/cve-advisories/blob/main/2023/CVE-2023-34795.md
exploit, third-party-advisory
Sources
- CVE List CVE-2023-34795
- NVD CVE-2023-34795
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