CVE-2026-3663A vulnerability was found in xlnt-community xlnt up to 1.6.1.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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A vulnerability was found in xlnt-community xlnt up to 1.6.1. This issue affects the function xlnt::detail::compound_document_istreambuf::xsgetn of the file source/detail/cryptography/compound_document.cpp of the component XLSX File Parser. Performing a manipulation results in out-of-bounds read. The attack is only possible with local access. The exploit has been made public and could be used. The patch is named 147. It is recommended to apply a patch to fix this issue.
- CVSS
- 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- CWE-119, CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
xlnt-community xlnt xlnt-community:xlnt | through 1.6.1 | NVD |
References
- https://github.com/oneafter/0128/blob/main/xl3/reproexploit
- https://github.com/xlnt-community/xlnt/product
- https://github.com/xlnt-community/xlnt/issues/139exploit, issue-tracking, vendor-advisory
- https://github.com/xlnt-community/xlnt/pull/147issue-tracking
- https://vuldb.com/?ctiid.349552permissions-required, vdb-entry
- https://vuldb.com/?id.349552third-party-advisory, vdb-entry
- https://vuldb.com/?submit.764644third-party-advisory, vdb-entry
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.