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Medium

Log injection via an unescaped password reset identity in AshAuthentication

Type: advisorySources: OSV

Improper Output Neutralization for Logs vulnerability in team-alembic AshAuthentication allows an unauthenticated attacker to forge application log entries by submitting a password reset identity containing newlines or control characters. AshAuthentication.Strategy.Password.RequestPasswordReset.run/3 interpolates the identity argument, the email or username taken straight from the reset request, into its Logger.warning/1 heredocs without escaping, truncating or type-restricting it. The resource logged beside it is passed through inspect/1, which would have neutralized the value. A newline in the identity therefore ends the log record, and everything after it is written as a line of its own, so an attacker chooses the severity tag and the content of entries that appear to have come from the application. This issue affects ash_authentication: from 4.2.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-86522
Confirmed fixed CVEs
Not specified
Updated in this feed
5 Nov 2026, 01:25 UTC · Revision 1

Source evidence

Log injection via an unescaped password reset identity in AshAuthentication

core-osv · Original source

Published 17 Sept 2026, 13:09 UTC

Improper Output Neutralization for Logs vulnerability in team-alembic AshAuthentication allows an unauthenticated attacker to forge application log entries by submitting a password reset identity containing newlines or control characters. AshAuthentication.Strategy.Password.RequestPasswordReset.run/3 interpolates the identity argument, the email or username taken straight from the reset request, into its Logger.warning/1 heredocs without escaping, truncating or type-restricting it. The resource logged beside it is passed through inspect/1, which would have neutralized the value. A newline in the identity therefore ends the log record, and everything after it is written as a line of its own, so an attacker chooses the severity tag and the content of entries that appear to have come from the application. This issue affects ash_authentication: from 4.2.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.

osv:CVE-2026-86522
Complete source record
{
  "id": "96aaf18bbf173fa143f3b6d8b6d1b4aa97236ea60a01eaa90663b183fef0a5d6",
  "url": "https://osv.dev/vulnerability/CVE-2026-86522",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Log injection via an unescaped password reset identity in AshAuthentication",
    "summary": "Improper Output Neutralization for Logs vulnerability in team-alembic AshAuthentication allows an unauthenticated attacker to forge application log entries by submitting a password reset identity containing newlines or control characters. AshAuthentication.Strategy.Password.RequestPasswordReset.run/3 interpolates the identity argument, the email or username taken straight from the reset request, into its Logger.warning/1 heredocs without escaping, truncating or type-restricting it. The resource logged beside it is passed through inspect/1, which would have neutralized the value. A newline in the identity therefore ends the log record, and everything after it is written as a line of its own, so an attacker chooses the severity tag and the content of entries that appear to have come from the application. This issue affects ash_authentication: from 4.2.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.",
    "evidence": "osv:CVE-2026-86522",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-86522",
      "aliases": [
        "CVE-2026-86522",
        "EEF-CVE-2026-86522",
        "GHSA-wg7g-r393-vr3g"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/team-alembic/ash_authentication",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3954f277929712755aef57a4a3a821688f121316"
                },
                {
                  "fixed": "fd19358bf0eee53ef13dcf17cc499bd4fb393981"
                },
                {
                  "introduced": "aa99001f0f9855f752f72093af2df5f97b7cae01"
                },
                {
                  "fixed": "d6b2be35cf8f0b8ab84e7a934cfb0d91de0a3c17"
                },
                {
                  "introduced": "6767fe27eb952e5bc09aa2e5a7d8f96f5a1c424a"
                },
                {
                  "fixed": "fea75958a081ed337ceb578396174039694c48df"
                },
                {
                  "fixed": "3954f277929712755aef57a4a3a821688f121316"
                },
                {
                  "fixed": "57c7cc3236bef0fa9da19cb315414f216488866d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3954f277929712755aef57a4a3a821688f121316"
                      },
                      {
                        "fixed": "fd19358bf0eee53ef13dcf17cc499bd4fb393981"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "ChangesAt"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.2.0"
                      },
                      {
                        "fixed": "4.15.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "5.0.0-rc.0"
                      },
                      {
                        "fixed": "5.0.0-rc.14"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3954f277929712755aef57a4a3a821688f121316"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "fd19358bf0eee53ef13dcf17cc499bd4fb393981"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "57c7cc3236bef0fa9da19cb315414f216488866d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.14.2",
            "v5.0.0-rc.13",
            "v4.14.1",
            "v5.0.0-rc.12",
            "v5.0.0-rc.11",
            "v5.0.0-rc.10",
            "v4.14.0",
            "v4.13.7",
            "5.0.0-rc.9",
            "5.0.0-rc.8",
            "v5.0.0-rc.7",
            "v5.0.0-rc.6",
            "v5.0.0-rc.5",
            "v5.0.0-rc.4",
            "v5.0.0-rc.3",
            "v5.0.0-rc.2",
            "v5.0.0-rc.1",
            "v5.0.0-rc.0",
            "v4.13.6",
            "v4.13.5",
            "v4.13.4",
            "v4.13.3",
            "v4.13.2",
            "v4.13.1",
            "v4.13.0",
            "v4.12.0",
            "v4.11.0",
            "v4.10.0",
            "v4.9.9",
            "v4.9.8",
            "v4.9.7",
            "v4.9.6",
            "v4.9.5",
            "v4.9.4",
            "v4.9.3",
            "v4.9.2",
            "v4.9.1",
            "v4.9.0",
            "v4.8.7",
            "v4.8.5",
            "v4.8.4",
            "v4.8.3",
            "v4.8.2",
            "v4.8.1",
            "v4.8.0",
            "v4.7.7",
            "v4.7.6",
            "v4.7.5",
            "v4.7.4",
            "v4.7.3",
            "v4.7.2",
            "v4.7.1",
            "v4.7.0",
            "v4.6.4",
            "v4.6.3",
            "v4.6.2",
            "v4.6.1",
            "v4.6.0",
            "v4.5.6",
            "v4.5.5",
            "v4.5.4",
            "v4.5.3",
            "v4.5.2",
            "v4.5.1",
            "v4.4.9",
            "v4.4.8",
            "v4.4.7",
            "v4.4.6",
            "v4.4.5",
            "v4.4.4",
            "v4.4.3",
            "v4.4.2",
            "v4.4.1",
            "v4.4.0",
            "v4.3.12",
            "v4.3.10",
            "v4.3.9",
            "v4.3.7",
            "v4.3.6",
            "v4.3.4",
            "v4.3.3",
            "v4.3.2",
            "v4.3.1",
            "v4.3.0",
            "v4.2.7",
            "v4.2.5",
            "v4.2.3",
            "v4.2.2",
            "v4.2.1",
            "v4.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86522.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.328193458Z",
      "provider": "osv",
      "references": [
        "https://cna.erlef.org/cves/CVE-2026-86522.html",
        "https://github.com",
        "https://osv.dev/vulnerability/EEF-CVE-2026-86522",
        "https://repo.hex.pm",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86522.json",
        "https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-wg7g-r393-vr3g",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-86522",
        "https://github.com/team-alembic/ash_authentication/commit/3954f277929712755aef57a4a3a821688f121316",
        "https://github.com/team-alembic/ash_authentication/commit/57c7cc3236bef0fa9da19cb315414f216488866d",
        "https://github.com/team-alembic/ash_authentication/commit/fd19358bf0eee53ef13dcf17cc499bd4fb393981",
        "https://github.com/team-alembic/ash_authentication"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-117"
        ],
        "cna_assigner": "EEF",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86522.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-86522",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509070,
  "published_at": "2026-09-17T13:09:11.572+00:00"
}