Vulnerability-Lookup

UBUNTU-CVE-2026-32877 (CVE-2026-32877)

Vulnerability from osv_ubuntu – Published: 2026-03-30 21:17 – Updated: 2026-10-17 09:40 – Source website

Details

Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially other undefined behavior. This issue has been patched in version 3.11.0.

Severity

8.2 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

8.2 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-32877	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-32877	REPORT
	https://github.com/randombit/botan/security/advis…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libbotan-1.10-0",
            "binary_version": "1.10.5-1+deb7u1ubuntu0.14.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "botan1.10",
        "purl": "pkg:deb/ubuntu/botan1.10@1.10.5-1+deb7u1ubuntu0.14.04.1+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.5-1",
        "1.10.5-1ubuntu1",
        "1.10.5-1+deb7u1ubuntu0.14.04.1",
        "1.10.5-1+deb7u1ubuntu0.14.04.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libbotan-1.10-1",
            "binary_version": "1.10.12-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "botan1.10",
        "purl": "pkg:deb/ubuntu/botan1.10@1.10.12-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.10-6",
        "1.10.12-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "botan",
            "binary_version": "2.4.0-5ubuntu1"
          },
          {
            "binary_name": "libbotan-2-4",
            "binary_version": "2.4.0-5ubuntu1"
          },
          {
            "binary_name": "python3-botan",
            "binary_version": "2.4.0-5ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "botan",
        "purl": "pkg:deb/ubuntu/botan@2.4.0-5ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.0-3",
        "2.4.0-4",
        "2.4.0-5ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libbotan-1.10-1",
            "binary_version": "1.10.17-0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "botan1.10",
        "purl": "pkg:deb/ubuntu/botan1.10@1.10.17-0.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.16-1",
        "1.10.17-0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "botan",
            "binary_version": "2.12.1-2build1"
          },
          {
            "binary_name": "libbotan-2-12",
            "binary_version": "2.12.1-2build1"
          },
          {
            "binary_name": "python3-botan",
            "binary_version": "2.12.1-2build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "botan",
        "purl": "pkg:deb/ubuntu/botan@2.12.1-2build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.9.0-2",
        "2.9.0-2build1",
        "2.12.1-2",
        "2.12.1-2build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "botan",
            "binary_version": "2.19.1+dfsg-2ubuntu1+esm1"
          },
          {
            "binary_name": "libbotan-2-19",
            "binary_version": "2.19.1+dfsg-2ubuntu1+esm1"
          },
          {
            "binary_name": "python3-botan",
            "binary_version": "2.19.1+dfsg-2ubuntu1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "botan",
        "purl": "pkg:deb/ubuntu/botan@2.19.1+dfsg-2ubuntu1+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17.3+dfsg-3",
        "2.19.1+dfsg-2ubuntu1",
        "2.19.1+dfsg-2ubuntu1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "botan",
            "binary_version": "2.19.3+dfsg-1ubuntu2+esm1"
          },
          {
            "binary_name": "libbotan-2-19",
            "binary_version": "2.19.3+dfsg-1ubuntu2+esm1"
          },
          {
            "binary_name": "python3-botan",
            "binary_version": "2.19.3+dfsg-1ubuntu2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "botan",
        "purl": "pkg:deb/ubuntu/botan@2.19.3+dfsg-1ubuntu2+esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.19.3+dfsg-1ubuntu1",
        "2.19.3+dfsg-1ubuntu2",
        "2.19.3+dfsg-1ubuntu2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libbotan-2-19",
            "binary_version": "2.19.5+dfsg-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "botan",
        "purl": "pkg:deb/ubuntu/botan@2.19.5+dfsg-4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.19.5+dfsg-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "botan",
            "binary_version": "3.7.1+dfsg-2"
          },
          {
            "binary_name": "libbotan-3-7",
            "binary_version": "3.7.1+dfsg-2"
          },
          {
            "binary_name": "python3-botan",
            "binary_version": "3.7.1+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "botan3",
        "purl": "pkg:deb/ubuntu/botan3@3.7.1+dfsg-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.1+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "botan",
            "binary_version": "3.12.0+dfsg-2"
          },
          {
            "binary_name": "libbotan-3-12",
            "binary_version": "3.12.0+dfsg-2"
          },
          {
            "binary_name": "python3-botan",
            "binary_version": "3.12.0+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "botan3",
        "purl": "pkg:deb/ubuntu/botan3@3.12.0+dfsg-2?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.10.0+dfsg-2",
        "3.11.1+dfsg-2",
        "3.12.0+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "botan",
            "binary_version": "3.10.0+dfsg-2"
          },
          {
            "binary_name": "libbotan-3-10",
            "binary_version": "3.10.0+dfsg-2"
          },
          {
            "binary_name": "python3-botan",
            "binary_version": "3.10.0+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "botan3",
        "purl": "pkg:deb/ubuntu/botan3@3.10.0+dfsg-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.1+dfsg-2",
        "3.10.0+dfsg-2"
      ]
    }
  ],
  "aliases": [],
  "details": "Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially other undefined behavior. This issue has been patched in version 3.11.0.",
  "id": "UBUNTU-CVE-2026-32877",
  "modified": "2026-10-17T09:40:49Z",
  "published": "2026-03-30T21:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-32877"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-32877"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/randombit/botan/security/advisories/GHSA-7jj6-4r42-w9h6"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-32877"
  ]
}

CVE-2026-32877 (GCVE-0-2026-32877)

Vulnerability from cvelistv5 – Published: 2026-03-30 20:36 – Updated: 2026-03-31 15:26

Title

Botan: Heap Buffer Over-read in SM2 Decryption via Undersized C3 Hash Field

Summary

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-31 15:25 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7761 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/randombit/botan/security/advis…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
randombit	botan	Affected: >= 2.3.0, < 3.11.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-32877",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T15:25:50.895890Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-31T15:26:01.443Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "botan",
          "vendor": "randombit",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.3.0, \u003c 3.11.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially other undefined behavior. This issue has been patched in version 3.11.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-30T20:36:43.672Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/randombit/botan/security/advisories/GHSA-7jj6-4r42-w9h6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/randombit/botan/security/advisories/GHSA-7jj6-4r42-w9h6"
        }
      ],
      "source": {
        "advisory": "GHSA-7jj6-4r42-w9h6",
        "discovery": "UNKNOWN"
      },
      "title": "Botan: Heap Buffer Over-read in SM2 Decryption via Undersized C3 Hash Field"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-32877",
    "datePublished": "2026-03-30T20:36:43.672Z",
    "dateReserved": "2026-03-16T21:03:44.420Z",
    "dateUpdated": "2026-03-31T15:26:01.443Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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UBUNTU-CVE-2026-32877 (CVE-2026-32877)

CVE-2026-32877 (GCVE-0-2026-32877)

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Vulnerability timeline

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