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FKIE_CVE-2026-2703

Vulnerability from fkie_nvd - Published: 2026-02-19 07:17 - Updated: 2026-06-17 10:31
Severity
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
cna@vuldb.comhttps://github.com/oneafter/0128/blob/main/xl1/reproExploit
cna@vuldb.comhttps://github.com/xlnt-community/xlnt/Product
cna@vuldb.comhttps://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bffb0734Patch
cna@vuldb.comhttps://github.com/xlnt-community/xlnt/issues/137Exploit, Issue Tracking, Vendor Advisory
cna@vuldb.comhttps://vuldb.com/?ctiid.346649Permissions Required, VDB Entry
cna@vuldb.comhttps://vuldb.com/?id.346649Third Party Advisory, VDB Entry
cna@vuldb.comhttps://vuldb.com/?submit.754377Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
xlnt-community xlnt *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "modules": [
            "Encrypted XLSX File Parser"
          ],
          "product": "xlnt",
          "vendor": "xlnt-community",
          "versions": [
            {
              "status": "affected",
              "version": "1.6.0"
            },
            {
              "status": "affected",
              "version": "1.6.1"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:xlnt-community:xlnt:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9B381094-639E-4E21-8CB0-60C480F02400",
              "versionEndIncluding": "1.6.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una debilidad en xlnt-community xlnt hasta 1.6.1. La cual afecta a la funci\u00f3n xlnt::detail::decode_base64 del archivo source/detail/cryptography/base64.cpp del componente Analizador de Archivos XLSX Cifrados. Si se manipula se puede provocar un off-by-one. El ataque requiere acceso local. El exploit se ha puesto a disposici\u00f3n del p\u00fablico y podr\u00eda usarse para ataques. Este parche se llama f2d7bf494e5c52706843cf7eb9892821bffb0734. Se aconseja aplicar el parche para resolver este problema."
    }
  ],
  "id": "CVE-2026-2703",
  "lastModified": "2026-06-17T10:31:34.243",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 1.7,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.9,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-2703",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-24T01:40:32.932647Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-19T07:17:49.477",
  "references": [
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Exploit"
      ],
      "url": "https://github.com/oneafter/0128/blob/main/xl1/repro"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/xlnt-community/xlnt/"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bffb0734"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://github.com/xlnt-community/xlnt/issues/137"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Permissions Required",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/?ctiid.346649"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/?id.346649"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/?submit.754377"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        },
        {
          "lang": "en",
          "value": "CWE-193"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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