CVE-2026-77352 (GCVE-0-2026-77352)

Vulnerability from cvelistv5 – Published: 2026-08-31 21:21 – Updated: 2026-09-01 14:57
VLAI
Title
Wallos: Authenticated SSRF via per-user SMTP notification host (low-privilege user)
Summary
Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of their personal email notifications to an internal IP. The per-user notification settings endpoint (endpoints/notifications/saveemailnotifications.php) performs no SSRF validation, and the notification cron (endpoints/cronjobs/sendnotifications.php) feeds that user-controlled host straight into PHPMailer ($mail->Host = $email['smtpAddress']). When the user's subscription notification fires, the server connects to the chosen host:port. This issue has been patched in version 5.0.0.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:15 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version CPE status
ellite Wallos Affected: >= 2.0.0, < 5.0.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-77352",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T14:15:10.690747Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-01T14:57:40.014Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Wallos",
          "vendor": "ellite",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 5.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of their personal email notifications to an internal IP. The per-user notification settings endpoint (endpoints/notifications/saveemailnotifications.php) performs no SSRF validation, and the notification cron (endpoints/cronjobs/sendnotifications.php) feeds that user-controlled host straight into PHPMailer ($mail-\u003eHost = $email[\u0027smtpAddress\u0027]). When the user\u0027s subscription notification fires, the server connects to the chosen host:port. This issue has been patched in version 5.0.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T21:21:06.895Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj"
        },
        {
          "name": "https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3"
        },
        {
          "name": "https://github.com/ellite/Wallos/releases/tag/v5.0.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ellite/Wallos/releases/tag/v5.0.0"
        }
      ],
      "source": {
        "advisory": "GHSA-c75x-9vj6-57qj",
        "discovery": "UNKNOWN"
      },
      "title": "Wallos: Authenticated SSRF via per-user SMTP notification host (low-privilege user)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-77352",
    "datePublished": "2026-08-31T21:21:06.895Z",
    "dateReserved": "2026-08-20T19:28:35.244Z",
    "dateUpdated": "2026-09-01T14:57:40.014Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-77352",
      "date": "2026-09-26",
      "epss": "0.00331",
      "percentile": "0.23687"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "Wallos",
                "vendor": "ellite",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 2.0.0, \u003c 5.0.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of their personal email notifications to an internal IP. The per-user notification settings endpoint (endpoints/notifications/saveemailnotifications.php) performs no SSRF validation, and the notification cron (endpoints/cronjobs/sendnotifications.php) feeds that user-controlled host straight into PHPMailer ($mail-\u003eHost = $email[\u0027smtpAddress\u0027]). When the user\u0027s subscription notification fires, the server connects to the chosen host:port. This issue has been patched in version 5.0.0."
          }
        ],
        "id": "CVE-2026-77352",
        "lastModified": "2026-09-08T21:11:31.703",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 1.4,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-77352",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T14:15:10.690747Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-08-31T22:17:20.607",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/ellite/Wallos/releases/tag/v5.0.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-918"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-77352",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-09-01T14:15:10.690747Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-09-01T14:14:37.625Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "Wallos",
              "vendor": "ellite",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003e= 2.0.0, \u003c 5.0.0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of their personal email notifications to an internal IP. The per-user notification settings endpoint (endpoints/notifications/saveemailnotifications.php) performs no SSRF validation, and the notification cron (endpoints/cronjobs/sendnotifications.php) feeds that user-controlled host straight into PHPMailer ($mail-\u003eHost = $email[\u0027smtpAddress\u0027]). When the user\u0027s subscription notification fires, the server connects to the chosen host:port. This issue has been patched in version 5.0.0."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-918",
                  "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-31T21:21:06.895Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj"
            },
            {
              "name": "https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3"
            },
            {
              "name": "https://github.com/ellite/Wallos/releases/tag/v5.0.0",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/ellite/Wallos/releases/tag/v5.0.0"
            }
          ],
          "source": {
            "advisory": "GHSA-c75x-9vj6-57qj",
            "discovery": "UNKNOWN"
          },
          "title": "Wallos: Authenticated SSRF via per-user SMTP notification host (low-privilege user)"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-77352",
        "datePublished": "2026-08-31T21:21:06.895Z",
        "dateReserved": "2026-08-20T19:28:35.244Z",
        "dateUpdated": "2026-09-01T14:57:40.014Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.



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.