CVE-2026-120057 (GCVE-0-2026-120057)

Vulnerability from cvelistv5 – Published: 2026-11-02 19:09 – Updated: 2026-11-02 19:43
VLAI
Title
psqlODBC large-object read overflows the application buffer
Summary
psqlODBC copies the reply to a large-object read (loread) into the application's buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 19:17 UTC
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
PostgreSQL CNA under the redhat root
CNA scorecard C 70/100 over 126 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
PostgreSQL psqlODBC Affected: 0 , < 18.00.0006 (custom)
guessed Create a notification for this product.
Date Public
2026-11-02 00:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-120057",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-02T19:17:40.542954Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-02T19:43:04.416Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "psqlODBC",
          "programFiles": [
            "connection.c",
            "lobj.c",
            "convert.c"
          ],
          "programRoutines": [
            {
              "name": "CC_send_function"
            },
            {
              "name": "odbc_lo_read"
            },
            {
              "name": "convert_lo"
            }
          ],
          "repo": "https://github.com/postgresql-interfaces/psqlodbc",
          "vendor": "PostgreSQL",
          "versions": [
            {
              "lessThan": "18.00.0006",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2026-11-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "psqlODBC copies the reply to a large-object read (loread) into the application\u0027s buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T19:09:09.117Z",
        "orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "shortName": "PostgreSQL"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to psqlODBC 18.00.0006 or later. CC_send_function receives the caller\u0027s buffer size, clamps the copy to it, and rejects short fixed-size replies."
        }
      ],
      "title": "psqlODBC large-object read overflows the application buffer",
      "workarounds": [
        {
          "lang": "en",
          "value": "Do not fetch large-object (lo) columns from servers that are not authenticated with sslmode=verify-full or an equivalent GSS setting."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
    "assignerShortName": "PostgreSQL",
    "cveId": "CVE-2026-120057",
    "datePublished": "2026-11-02T19:09:09.117Z",
    "dateReserved": "2026-10-30T19:25:18.919Z",
    "dateUpdated": "2026-11-02T19:43:04.416Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-120057",
      "date": "2026-11-04",
      "epss": "0.00244",
      "percentile": "0.15758"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "psqlODBC",
                "programFiles": [
                  "connection.c",
                  "lobj.c",
                  "convert.c"
                ],
                "programRoutines": [
                  {
                    "name": "CC_send_function"
                  },
                  {
                    "name": "odbc_lo_read"
                  },
                  {
                    "name": "convert_lo"
                  }
                ],
                "repo": "https://github.com/postgresql-interfaces/psqlodbc",
                "vendor": "PostgreSQL",
                "versions": [
                  {
                    "lessThan": "18.00.0006",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "psqlODBC copies the reply to a large-object read (loread) into the application\u0027s buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected."
          }
        ],
        "id": "CVE-2026-120057",
        "lastModified": "2026-11-02T20:17:38.787",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.6,
              "impactScore": 5.9,
              "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-120057",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-02T19:17:40.542954Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-11-02T19:18:02.700",
        "references": [
          {
            "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
            "url": "https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r"
          }
        ],
        "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-120"
              }
            ],
            "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-11-04T16:21:12+00:00",
      "cve": "CVE-2026-120057",
      "id": "CVE-2026-120057",
      "initial_release_date": "2026-11-02T19:09:09.117000+00:00",
      "product_status:known_affected": "6",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "postgresql-odbc: postgresql-odbc: arbitrary code execution via buffer overflow in large-object read",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-120057.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-120057",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-11-02T19:17:40.542954Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-11-02T19:34:55.464Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "psqlODBC",
              "programFiles": [
                "connection.c",
                "lobj.c",
                "convert.c"
              ],
              "programRoutines": [
                {
                  "name": "CC_send_function"
                },
                {
                  "name": "odbc_lo_read"
                },
                {
                  "name": "convert_lo"
                }
              ],
              "repo": "https://github.com/postgresql-interfaces/psqlodbc",
              "vendor": "PostgreSQL",
              "versions": [
                {
                  "lessThan": "18.00.0006",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "datePublic": "2026-11-02T00:00:00.000Z",
          "descriptions": [
            {
              "lang": "en",
              "value": "psqlODBC copies the reply to a large-object read (loread) into the application\u0027s buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-120",
                  "description": "CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-11-02T19:09:09.117Z",
            "orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
            "shortName": "PostgreSQL"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "value": "Upgrade to psqlODBC 18.00.0006 or later. CC_send_function receives the caller\u0027s buffer size, clamps the copy to it, and rejects short fixed-size replies."
            }
          ],
          "title": "psqlODBC large-object read overflows the application buffer",
          "workarounds": [
            {
              "lang": "en",
              "value": "Do not fetch large-object (lo) columns from servers that are not authenticated with sslmode=verify-full or an equivalent GSS setting."
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "assignerShortName": "PostgreSQL",
        "cveId": "CVE-2026-120057",
        "datePublished": "2026-11-02T19:09:09.117Z",
        "dateReserved": "2026-10-30T19:25:18.919Z",
        "dateUpdated": "2026-11-02T19:43:04.416Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.