{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a64cab49b8886503e6b7c7b211d83c475aac48ca"
            },
            {
              "fixed": "cdbf4c4da6bda5f6f139078f01a64320b595216d"
            }
          ],
          "repo": "https://github.com/ash-project/ash",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-cwjv-574p-59f6"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-1284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82752.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "0.10.0"
          },
          {
            "fixed": "3.33.0"
          },
          {
            "introduced": "05848d5f4affe60fddd812222a18ada080c0813b"
          },
          {
            "fixed": "*"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "0.10.0"
          },
          {
            "fixed": "3.33.0"
          }
        ],
        "source": "CPE_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "0.10.0"
          },
          {
            "fixed": "3.33.0"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "Improper Validation of Specified Quantity in Input vulnerability in ash-project ash allows an attacker to store a value of arbitrary size in an attribute whose length constraint should bound it.\n\nAsh measures string length with Elixir's String.length/1, which counts Unicode graphemes, in the max_length and min_length constraints of Ash.Type.String (apply_constraints/2 in lib/ash/type/string.ex), in Ash.Resource.Validation.StringLength, and in the string_length expression function. A grapheme carries an unbounded number of combining marks, so a base character followed by a million combining acute accents is one grapheme and megabytes of data, and satisfies max_length: 2. Where the data layer imposes no independent limit (ETS, Mnesia, or a Postgres text column) the whole value is persisted, so an attacker can write an entire request body into an attribute declared with a small maximum and grow storage without bound.\n\nThe counting unit also disagrees with the storage layer, which counts codepoints rather than graphemes, so a value accepted by the constraint can still be rejected or truncated by the column. A Postgres varchar(n) column bounds the value itself and is not exposed.\n\nThis issue affects ash: from 0.10.0 before 3.33.0.",
  "id": "CVE-2026-82752",
  "modified": "2026-09-10T03:30:43.401185889Z",
  "published": "2026-09-05T17:16:16.722Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82752.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82752"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82752.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash/security/advisories/GHSA-cwjv-574p-59f6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82752"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash/commit/a64cab49b8886503e6b7c7b211d83c475aac48ca"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash/commit/cdbf4c4da6bda5f6f139078f01a64320b595216d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ash-project/ash"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Ash string length constraints count graphemes, so a combining-mark string of any size passes max_length"
}