{"id":"CVE-2026-82752","title":"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 …","summary":"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 …","severity":"medium","cvss":5.9,"cvssVector":"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","cwe":["CWE-1284"],"vendor":"ash-project","product":"ash","affected":["ash >= 0.10.0 < 3.33.0","ash-project/ash >= 05848d5f4affe60fddd812222a18ada080c0813b < *"],"published":"2026-09-05","updated":"2026-09-08","sourceUpdated":"2026-09-08T19:20:01.577","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82752","references":[{"url":"https://cna.erlef.org/cves/CVE-2026-82752.html","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/ash-project/ash/commit/a64cab49b8886503e6b7c7b211d83c475aac48ca","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/ash-project/ash/commit/cdbf4c4da6bda5f6f139078f01a64320b595216d","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/ash-project/ash/security/advisories/GHSA-cwjv-574p-59f6","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-82752","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T18:19:23.967428Z"},"cvssSource":"cna","epss":0.0018,"epssPercentile":0.06794,"ingestedAt":"2026-09-06T10:53:51.733Z","slug":"CVE-2026-82752","body":"## Overview\n\nImproper 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":44,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":8268,"id":"CVE-2026-82752","ts":1788919995227,"field":"exploit_available","old":"false","new":"true"},{"seq":8267,"id":"CVE-2026-82752","ts":1788919995227,"field":"cvss","old":null,"new":"5.9"},{"seq":8266,"id":"CVE-2026-82752","ts":1788919995227,"field":"severity","old":"none","new":"medium"},{"seq":8077,"id":"CVE-2026-82752","ts":1788919281094,"field":"exploit_available","old":"true","new":"false"},{"seq":8076,"id":"CVE-2026-82752","ts":1788919281094,"field":"cvss","old":"5.9","new":null},{"seq":8075,"id":"CVE-2026-82752","ts":1788919281094,"field":"severity","old":"medium","new":"none"},{"seq":7886,"id":"CVE-2026-82752","ts":1788916356310,"field":"exploit_available","old":"false","new":"true"},{"seq":7885,"id":"CVE-2026-82752","ts":1788916356310,"field":"cvss","old":null,"new":"5.9"},{"seq":7884,"id":"CVE-2026-82752","ts":1788916356310,"field":"severity","old":"none","new":"medium"},{"seq":7695,"id":"CVE-2026-82752","ts":1788915297794,"field":"exploit_available","old":"true","new":"false"},{"seq":7694,"id":"CVE-2026-82752","ts":1788915297794,"field":"cvss","old":"5.9","new":null},{"seq":7693,"id":"CVE-2026-82752","ts":1788915297794,"field":"severity","old":"medium","new":"none"},{"seq":7504,"id":"CVE-2026-82752","ts":1788912716950,"field":"exploit_available","old":"false","new":"true"},{"seq":7503,"id":"CVE-2026-82752","ts":1788912716950,"field":"cvss","old":null,"new":"5.9"},{"seq":7502,"id":"CVE-2026-82752","ts":1788912716950,"field":"severity","old":"none","new":"medium"},{"seq":7313,"id":"CVE-2026-82752","ts":1788911331739,"field":"exploit_available","old":"true","new":"false"},{"seq":7312,"id":"CVE-2026-82752","ts":1788911331739,"field":"cvss","old":"5.9","new":null},{"seq":7311,"id":"CVE-2026-82752","ts":1788911331739,"field":"severity","old":"medium","new":"none"},{"seq":7117,"id":"CVE-2026-82752","ts":1788909078588,"field":"exploit_available","old":"false","new":"true"},{"seq":7116,"id":"CVE-2026-82752","ts":1788909078588,"field":"cvss","old":null,"new":"5.9"},{"seq":7115,"id":"CVE-2026-82752","ts":1788909078588,"field":"severity","old":"none","new":"medium"},{"seq":6929,"id":"CVE-2026-82752","ts":1788907391821,"field":"exploit_available","old":"true","new":"false"},{"seq":6928,"id":"CVE-2026-82752","ts":1788907391821,"field":"cvss","old":"5.9","new":null},{"seq":6927,"id":"CVE-2026-82752","ts":1788907391821,"field":"severity","old":"medium","new":"none"},{"seq":6731,"id":"CVE-2026-82752","ts":1788905444510,"field":"exploit_available","old":"false","new":"true"},{"seq":6730,"id":"CVE-2026-82752","ts":1788905444510,"field":"cvss","old":null,"new":"5.9"},{"seq":6729,"id":"CVE-2026-82752","ts":1788905444510,"field":"severity","old":"none","new":"medium"},{"seq":6549,"id":"CVE-2026-82752","ts":1788903460034,"field":"exploit_available","old":"true","new":"false"},{"seq":6548,"id":"CVE-2026-82752","ts":1788903460034,"field":"cvss","old":"5.9","new":null},{"seq":6547,"id":"CVE-2026-82752","ts":1788903460034,"field":"severity","old":"medium","new":"none"},{"seq":6335,"id":"CVE-2026-82752","ts":1788901810864,"field":"exploit_available","old":"false","new":"true"},{"seq":6334,"id":"CVE-2026-82752","ts":1788901810864,"field":"cvss","old":null,"new":"5.9"},{"seq":6333,"id":"CVE-2026-82752","ts":1788901810864,"field":"severity","old":"none","new":"medium"},{"seq":6165,"id":"CVE-2026-82752","ts":1788899562427,"field":"exploit_available","old":"true","new":"false"},{"seq":6164,"id":"CVE-2026-82752","ts":1788899562427,"field":"cvss","old":"5.9","new":null},{"seq":6163,"id":"CVE-2026-82752","ts":1788899562427,"field":"severity","old":"medium","new":"none"},{"seq":5958,"id":"CVE-2026-82752","ts":1788898180054,"field":"exploit_available","old":"false","new":"true"},{"seq":5957,"id":"CVE-2026-82752","ts":1788898180054,"field":"cvss","old":null,"new":"5.9"},{"seq":5956,"id":"CVE-2026-82752","ts":1788898180054,"field":"severity","old":"none","new":"medium"},{"seq":5847,"id":"CVE-2026-82752","ts":1788895711380,"field":"exploit_available","old":"true","new":"false"},{"seq":5846,"id":"CVE-2026-82752","ts":1788895711380,"field":"cvss","old":"5.9","new":null},{"seq":5845,"id":"CVE-2026-82752","ts":1788895711380,"field":"severity","old":"medium","new":"none"},{"seq":5765,"id":"CVE-2026-82752","ts":1788894573022,"field":"exploit_available","old":"false","new":"true"},{"seq":5764,"id":"CVE-2026-82752","ts":1788894573022,"field":"cvss","old":null,"new":"5.9"},{"seq":5763,"id":"CVE-2026-82752","ts":1788894573022,"field":"severity","old":"none","new":"medium"}]}