CVE-2026-2016 (GCVE-0-2026-2016)

Vulnerability from cvelistv5 – Published: 2026-02-06 11:02 – Updated: 2026-02-23 09:24 X_Open Source
VLAI
Title
happyfish100 libfastcommon base64.c base64_decode stack-based overflow
Summary
A security vulnerability has been detected in happyfish100 libfastcommon up to 1.0.84. Affected by this vulnerability is the function base64_decode of the file src/base64.c. The manipulation leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. The identifier of the patch is 82f66af3e252e3e137dba0c3891570f085e79adf. Applying a patch is the recommended action to fix this issue.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-06 13:08 UTC
CWE
Assigner
VulDB CNA
Impacted products
Vendor Product Version
happyfish100 libfastcommon Affected: 1.0.0
Affected: 1.0.1
Affected: 1.0.2
Affected: 1.0.3
Affected: 1.0.4
Affected: 1.0.5
Affected: 1.0.6
Affected: 1.0.7
Affected: 1.0.8
Affected: 1.0.9
Affected: 1.0.10
Affected: 1.0.11
Affected: 1.0.12
Affected: 1.0.13
Affected: 1.0.14
Affected: 1.0.15
Affected: 1.0.16
Affected: 1.0.17
Affected: 1.0.18
Affected: 1.0.19
Affected: 1.0.20
Affected: 1.0.21
Affected: 1.0.22
Affected: 1.0.23
Affected: 1.0.24
Affected: 1.0.25
Affected: 1.0.26
Affected: 1.0.27
Affected: 1.0.28
Affected: 1.0.29
Affected: 1.0.30
Affected: 1.0.31
Affected: 1.0.32
Affected: 1.0.33
Affected: 1.0.34
Affected: 1.0.35
Affected: 1.0.36
Affected: 1.0.37
Affected: 1.0.38
Affected: 1.0.39
Affected: 1.0.40
Affected: 1.0.41
Affected: 1.0.42
Affected: 1.0.43
Affected: 1.0.44
Affected: 1.0.45
Affected: 1.0.46
Affected: 1.0.47
Affected: 1.0.48
Affected: 1.0.49
Affected: 1.0.50
Affected: 1.0.51
Affected: 1.0.52
Affected: 1.0.53
Affected: 1.0.54
Affected: 1.0.55
Affected: 1.0.56
Affected: 1.0.57
Affected: 1.0.58
Affected: 1.0.59
Affected: 1.0.60
Affected: 1.0.61
Affected: 1.0.62
Affected: 1.0.63
Affected: 1.0.64
Affected: 1.0.65
Affected: 1.0.66
Affected: 1.0.67
Affected: 1.0.68
Affected: 1.0.69
Affected: 1.0.70
Affected: 1.0.71
Affected: 1.0.72
Affected: 1.0.73
Affected: 1.0.74
Affected: 1.0.75
Affected: 1.0.76
Affected: 1.0.77
Affected: 1.0.78
Affected: 1.0.79
Affected: 1.0.80
Affected: 1.0.81
Affected: 1.0.82
Affected: 1.0.83
Affected: 1.0.84
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                  "version": "1.0.60"
                },
                {
                  "status": "affected",
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                },
                {
                  "status": "affected",
                  "version": "1.0.62"
                },
                {
                  "status": "affected",
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                  "status": "affected",
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                  "status": "affected",
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                  "status": "affected",
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                {
                  "status": "affected",
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                },
                {
                  "status": "affected",
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                },
                {
                  "status": "affected",
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                },
                {
                  "status": "affected",
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                {
                  "status": "affected",
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                },
                {
                  "status": "affected",
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                },
                {
                  "status": "affected",
                  "version": "1.0.73"
                },
                {
                  "status": "affected",
                  "version": "1.0.74"
                },
                {
                  "status": "affected",
                  "version": "1.0.75"
                },
                {
                  "status": "affected",
                  "version": "1.0.76"
                },
                {
                  "status": "affected",
                  "version": "1.0.77"
                },
                {
                  "status": "affected",
                  "version": "1.0.78"
                },
                {
                  "status": "affected",
                  "version": "1.0.79"
                },
                {
                  "status": "affected",
                  "version": "1.0.80"
                },
                {
                  "status": "affected",
                  "version": "1.0.81"
                },
                {
                  "status": "affected",
                  "version": "1.0.82"
                },
                {
                  "status": "affected",
                  "version": "1.0.83"
                },
                {
                  "status": "affected",
                  "version": "1.0.84"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "reporter",
              "value": "liloler (VulDB User)"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "A security vulnerability has been detected in happyfish100 libfastcommon up to 1.0.84. Affected by this vulnerability is the function base64_decode of the file src/base64.c. The manipulation leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. The identifier of the patch is 82f66af3e252e3e137dba0c3891570f085e79adf. Applying a patch is the recommended action to fix this issue."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "baseScore": 4.8,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
                "version": "4.0"
              }
            },
            {
              "cvssV3_1": {
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
                "version": "3.1"
              }
            },
            {
              "cvssV3_0": {
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
                "version": "3.0"
              }
            },
            {
              "cvssV2_0": {
                "baseScore": 4.3,
                "vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
                "version": "2.0"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-121",
                  "description": "Stack-based Buffer Overflow",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-119",
                  "description": "Memory Corruption",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-02-23T09:24:15.968Z",
            "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
            "shortName": "VulDB"
          },
          "references": [
            {
              "name": "VDB-344598 | happyfish100 libfastcommon base64.c base64_decode stack-based overflow",
              "tags": [
                "vdb-entry",
                "technical-description"
              ],
              "url": "https://vuldb.com/?id.344598"
            },
            {
              "name": "VDB-344598 | CTI Indicators (IOB, IOC, IOA)",
              "tags": [
                "signature",
                "permissions-required"
              ],
              "url": "https://vuldb.com/?ctiid.344598"
            },
            {
              "name": "Submit #743873 | happyfish100 libfastcommon V1.0.84 and earlier Heap-based Buffer Overflow",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://vuldb.com/?submit.743873"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/happyfish100/libfastcommon/issues/55"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/happyfish100/libfastcommon/issues/55#issuecomment-3776757848"
            },
            {
              "tags": [
                "exploit",
                "issue-tracking"
              ],
              "url": "https://github.com/happyfish100/libfastcommon/issues/55#issue-3836362577"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/happyfish100/libfastcommon/commit/82f66af3e252e3e137dba0c3891570f085e79adf"
            },
            {
              "tags": [
                "product"
              ],
              "url": "https://github.com/happyfish100/libfastcommon/"
            }
          ],
          "tags": [
            "x_open-source"
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-02-05T00:00:00.000Z",
              "value": "Advisory disclosed"
            },
            {
              "lang": "en",
              "time": "2026-02-05T01:00:00.000Z",
              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2026-02-18T01:03:36.000Z",
              "value": "VulDB entry last update"
            }
          ],
          "title": "happyfish100 libfastcommon base64.c base64_decode stack-based overflow"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2026-2016",
        "datePublished": "2026-02-06T11:02:08.107Z",
        "dateReserved": "2026-02-05T19:35:28.683Z",
        "dateUpdated": "2026-02-23T09:24:15.968Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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