{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-2703","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","state":"PUBLISHED","assignerShortName":"VulDB","dateReserved":"2026-02-18T17:59:02.756Z","datePublished":"2026-02-19T04:02:10.794Z","dateUpdated":"2026-02-24T01:40:43.838Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","shortName":"VulDB","dateUpdated":"2026-02-23T10:28:34.926Z"},"title":"xlnt-community xlnt Encrypted XLSX File base64.cpp decode_base64 off-by-one","problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-193","lang":"en","description":"Off-by-One"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-189","lang":"en","description":"Numeric Error"}]}],"affected":[{"vendor":"xlnt-community","product":"xlnt","versions":[{"version":"1.6.0","status":"affected"},{"version":"1.6.1","status":"affected"}],"modules":["Encrypted XLSX File Parser"]}],"descriptions":[{"lang":"en","value":"A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to off-by-one. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called f2d7bf494e5c52706843cf7eb9892821bffb0734. Applying a patch is advised to resolve this issue."}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":4.8,"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","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":3.3,"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","baseSeverity":"LOW"}},{"cvssV3_0":{"version":"3.0","baseScore":3.3,"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","baseSeverity":"LOW"}},{"cvssV2_0":{"version":"2.0","baseScore":1.7,"vectorString":"AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C"}}],"timeline":[{"time":"2026-02-18T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-02-18T01:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-02-18T19:04:11.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"Oneafter (VulDB User)","type":"reporter"}],"references":[{"url":"https://vuldb.com/?id.346649","name":"VDB-346649 | xlnt-community xlnt Encrypted XLSX File base64.cpp decode_base64 off-by-one","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/?ctiid.346649","name":"VDB-346649 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/?submit.754377","name":"Submit #754377 | xlnt-community xlnt  5606f5b Heap-based Buffer Overflow","tags":["third-party-advisory"]},{"url":"https://github.com/xlnt-community/xlnt/issues/137","tags":["issue-tracking"]},{"url":"https://github.com/oneafter/0128/blob/main/xl1/repro","tags":["exploit"]},{"url":"https://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bffb0734","tags":["patch"]},{"url":"https://github.com/xlnt-community/xlnt/","tags":["product"]}],"tags":["x_open-source"]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-24T01:40:32.932647Z","id":"CVE-2026-2703","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-02-24T01:40:43.838Z"}}]}}