PT-2026-23859 · Xlnt · Xlnt

Oneafter · Publicado 2026-03-07 · Atualizado 2026-03-10 · CVE-2026-3663

Positive Technologies (AI Summary)

CVSS v3.1

7.1

Alta

Vetor base

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

Name of the Vulnerable Software and Affected Versions xlnt versions up to 1.6.1

Description A flaw exists within the xlnt library, specifically in the XLSX File Parser component. This issue resides in the xlnt::detail::compound document istreambuf::xsgetn function within the source/detail/cryptography/compound document.cpp file. A manipulation of the file can lead to an out-of-bounds read, and the exploit has been publicly disclosed. The issue is only exploitable with local access.

Recommendations Apply patch 147 to resolve this issue.

Exploit

Correção

Buffer Overflow

Out of bounds Read

Enumeração de Fraquezas

CWE-119

CWE-125

Identificadores relacionados

CVE-2026-3663

Produtos afetados

Xlnt

Referências · 15

• 🔥 https://github.com/oneafter/0128/blob/main/xl3/repro · Exploit
• https://github.com/xlnt-community/xlnt/pull/147 · Correção
• https://github.com/xlnt-community/xlnt/issues/139 · Aviso do Fabricante
• https://t.me/cveNotify/154982 · Publicação no Telegram
• https://twitter.com/CVEnew/status/2030339317584015812 · Publicação no Twitter
• https://twitter.com/cyberbivash/status/2030317520863777275 · Publicação no Twitter
• https://vuldb.com/?id.349552 · Nota
• https://github.com/xlnt-community/xlnt · Nota
• https://twitter.com/VulmonFeeds/status/2030306550833623399 · Publicação no Twitter
• https://nvd.nist.gov/vuln/detail/CVE-2026-3663 · Nota de Segurança
• https://osv.dev/vulnerability/CVE-2026-3663 · Aviso do Fabricante
• https://vuldb.com/?ctiid.349552 · Nota
• https://t.me/cveNotify/154596 · Publicação no Telegram
• https://vuldb.com/?submit.764644 · Nota
• https://t.me/CVEtracker/46724 · Publicação no Telegram