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    2 vulnerabilities found for ash_double_entry by ash-project

    CVE-2026-81638 (GCVE-0-2026-81638)

    Vulnerability from nvd – Published: 2026-09-07 22:33 – Updated: 2026-09-08 14:44
    VLAI
    Title
    Non-canonical ULID spellings are accepted and alias to the same record in ash_double_entry
    Summary
    Improper Handling of Alternate Encoding vulnerability in ash-project ash_double_entry allows an attacker to submit several distinct string spellings of the same identifier. AshDoubleEntry.ULID renders a 128-bit ULID as 26 Crockford base-32 characters, but the first character encodes only 3 bits, so canonical values are 0 to 7. decode/1 in lib/ulid.ex masks the first character to its low 3 bits and valid?/1 accepts all 32 characters in that position, so 0..., 8..., G... and R... decode to the identical 16-byte value and resolve to the same row. When the type is exposed as a public ID over an HTTP or API boundary, an attacker-supplied ID can be spelled differently from the record it actually reads or writes, desynchronizing or bypassing string-level checks such as idempotency and deduplication keys, deny-lists, audit correlation, or signatures computed over the submitted ID. This issue affects ash_double_entry: from 0.1.0 before 1.0.19.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-08 14:44 UTC
    CWE
    • CWE-173 - Improper Handling of Alternate Encoding
    Assigner
    Impacted products
    Vendor Product Version
    ash-project ash_double_entry Affected: 0.1.0 , < 1.0.19 (semver)
        cpe:2.3:a:ash-project:ash_double_entry:*:*:*:*:*:*:*:*
    Create a notification for this product.
    ash-project ash_double_entry Affected: 1e5f7ce8ff25f519c904731a29eb1258324e561a , < d3e688d300a581ae214b3ca7d95ef4de63fbb050 (git)
        cpe:2.3:a:ash-project:ash_double_entry:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-81638 (GCVE-0-2026-81638)

    Vulnerability from cvelistv5 – Published: 2026-09-07 22:33 – Updated: 2026-09-08 14:44
    VLAI
    Title
    Non-canonical ULID spellings are accepted and alias to the same record in ash_double_entry
    Summary
    Improper Handling of Alternate Encoding vulnerability in ash-project ash_double_entry allows an attacker to submit several distinct string spellings of the same identifier. AshDoubleEntry.ULID renders a 128-bit ULID as 26 Crockford base-32 characters, but the first character encodes only 3 bits, so canonical values are 0 to 7. decode/1 in lib/ulid.ex masks the first character to its low 3 bits and valid?/1 accepts all 32 characters in that position, so 0..., 8..., G... and R... decode to the identical 16-byte value and resolve to the same row. When the type is exposed as a public ID over an HTTP or API boundary, an attacker-supplied ID can be spelled differently from the record it actually reads or writes, desynchronizing or bypassing string-level checks such as idempotency and deduplication keys, deny-lists, audit correlation, or signatures computed over the submitted ID. This issue affects ash_double_entry: from 0.1.0 before 1.0.19.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-08 14:44 UTC
    CWE
    • CWE-173 - Improper Handling of Alternate Encoding
    Assigner
    Impacted products
    Vendor Product Version
    ash-project ash_double_entry Affected: 0.1.0 , < 1.0.19 (semver)
        cpe:2.3:a:ash-project:ash_double_entry:*:*:*:*:*:*:*:*
    Create a notification for this product.
    ash-project ash_double_entry Affected: 1e5f7ce8ff25f519c904731a29eb1258324e561a , < d3e688d300a581ae214b3ca7d95ef4de63fbb050 (git)
        cpe:2.3:a:ash-project:ash_double_entry:*:*:*:*:*:*:*:*
    Create a notification for this product.
    Show details on NVD website

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              "capecId": "CAPEC-267",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-267 Leverage Alternate Encoding"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "LOCAL",
                "baseScore": 2.1,
                "baseSeverity": "LOW",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "LOW",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-173",
                  "description": "CWE-173 Improper Handling of Alternate Encoding",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-07T22:33:29.297Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory",
                "related"
              ],
              "url": "https://github.com/ash-project/ash_double_entry/security/advisories/GHSA-qxp2-vgp9-268q"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://cna.erlef.org/cves/CVE-2026-81638.html"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-81638"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/ash-project/ash_double_entry/commit/d3e688d300a581ae214b3ca7d95ef4de63fbb050"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Non-canonical ULID spellings are accepted and alias to the same record in ash_double_entry"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-81638",
        "datePublished": "2026-09-07T22:33:29.297Z",
        "dateReserved": "2026-09-07T19:30:01.624Z",
        "dateUpdated": "2026-09-08T14:44:19.138Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }