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CVE-2026-3663

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:40bcaec33dce61af36e3fbef1b24b119746a9e2f177d0fc35bcf0bd8efcc2312
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":1.7,"vectorString":"AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":4.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-119","description":"Memory Corruption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-125","description":"Out-of-Bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"modules":["XLSX File Parser"],"product":"xlnt","vendor":"xlnt-community","versions":[{"status":"affected","version":"1.6.0"},{"status":"affected","version":"1.6.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":1.7,"vectorString":"AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":3.3,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":4.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-119","description":"Memory Corruption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-125","description":"Out-of-Bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"tags":["exploit"],"url":"https://github.com/oneafter/0128/blob/main/xl3/repro"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/references/4
{"tags":["product"],"url":"https://github.com/xlnt-community/xlnt/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/xlnt-community/xlnt/issues/139"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/references/3
{"tags":["issue-tracking","patch"],"url":"https://github.com/xlnt-community/xlnt/pull/147"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/references/5
{"name":"VDB-349552 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.349552"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/references/1
{"name":"VDB-349552 | xlnt-community xlnt XLSX File compound_document.cpp xsgetn out-of-bounds","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.349552"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/references/0
{"name":"Submit #764644 | xlnt-community xlnt commit bceb706 and before Heap-based Buffer Overflow","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.764644"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4c5e3cfb55999e0f7c51d8d009a1af89ad09d937e30bcd84ffe8d11e5df056b · sha256:28a622a0268453f7… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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