Vulnerability-Lookup

CVE-2026-78691 (GCVE-0-2026-78691)

Vulnerability from cvelistv5 – Published: 2026-08-30 11:55 – Updated: 2026-08-30 11:55

Title

Unescaped backslash allows LIKE wildcard injection in AshSql string search

Summary

Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash_sql allows a user who supplies a search term to contains/2, string_starts_with/2, or string_ends_with/2 to inject live SQL LIKE wildcards, turning a literal substring search into an attacker-controlled pattern match. The escape helpers in AshSql.Expr prefix % and _ with a backslash but never escape a backslash already present in the input. Because backslash is the default LIKE escape character, the escaping defeats itself: the input \% becomes the pattern fragment \\%, where \\ is a literal backslash and the attacker's % remains a live wildcard. The search value stays parameterized, so this is confined to the LIKE pattern grammar rather than full SQL. An attacker can widen matches to probe values, slip past a negated contains(...) guard, or crash the query with a trailing lone backslash. This issue affects ash_sql: from 0.1.1-rc.10 before 0.7.1.

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CWE

CWE-943 - Improper Neutralization of Special Elements in Data Query Logic

Assigner

EEF mitre root

References

4 references

URL	Tags
https://github.com/ash-project/ash_sql/security/a…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-78691.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-78691	related
https://github.com/ash-project/ash_sql/commit/d95…	patch

Impacted products

2 products

Vendor	Product	Version	CPE status
ash-project	ash_sql	Affected: 0.1.1-rc.10 , < 0.7.1 (semver) cpe:2.3:a:ash-project:ash_sql::::::::
ash-project	ash_sql	Affected: cfc7da474c5be2190fd62664a83a689377a8d512 , < d95c55c64b1b42cc2fd30211a4913f3145156cd4 (git) cpe:2.3:a:ash-project:ash_sql::::::::

Credits

Peter Ullrich Peter Ullrich Zach Daniel / Ash Project Jonatan Männchen / EEF

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.AshSql.Expr\u0027"
          ],
          "packageName": "ash_sql",
          "packageURL": "pkg:hex/ash_sql",
          "product": "ash_sql",
          "programFiles": [
            "lib/expr.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_contains/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_starts_with/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_ends_with/1"
            }
          ],
          "repo": "https://github.com/ash-project/ash_sql",
          "vendor": "ash-project",
          "versions": [
            {
              "lessThan": "0.7.1",
              "status": "affected",
              "version": "0.1.1-rc.10",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.AshSql.Expr\u0027"
          ],
          "packageName": "ash-project/ash_sql",
          "packageURL": "pkg:github/ash-project/ash_sql",
          "product": "ash_sql",
          "programFiles": [
            "lib/expr.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_contains/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_starts_with/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_ends_with/1"
            }
          ],
          "repo": "https://github.com/ash-project/ash_sql",
          "vendor": "ash-project",
          "versions": [
            {
              "lessThan": "d95c55c64b1b42cc2fd30211a4913f3145156cd4",
              "status": "affected",
              "version": "cfc7da474c5be2190fd62664a83a689377a8d512",
              "versionType": "git"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn application must pass untrusted input as the search term of \u003ccode\u003econtains/2\u003c/code\u003e, \u003ccode\u003estring_starts_with/2\u003c/code\u003e, or \u003ccode\u003estring_ends_with/2\u003c/code\u003e (for example a user-controlled substring search).\u003c/p\u003e"
            },
            {
              "base64": false,
              "type": "text/markdown",
              "value": "An application must pass untrusted input as the search term of `contains/2`, `string_starts_with/2`, or `string_ends_with/2` (for example a user-controlled substring search)."
            }
          ],
          "value": "An application must pass untrusted input as the search term of contains/2, string_starts_with/2, or string_ends_with/2 (for example a user-controlled substring search)."
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "0.7.1",
                  "versionStartIncluding": "0.1.1-rc.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "AND"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Peter Ullrich"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Peter Ullrich"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Zach Daniel / Ash Project"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Jonatan M\u00e4nnchen / EEF"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eImproper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash_sql allows a user who supplies a search term to \u003ccode\u003econtains/2\u003c/code\u003e, \u003ccode\u003estring_starts_with/2\u003c/code\u003e, or \u003ccode\u003estring_ends_with/2\u003c/code\u003e to inject live SQL \u003ccode\u003eLIKE\u003c/code\u003e wildcards, turning a literal substring search into an attacker-controlled pattern match.\u003c/p\u003e\n\u003cp\u003eThe escape helpers in \u003ccode\u003eAshSql.Expr\u003c/code\u003e prefix \u003ccode\u003e%\u003c/code\u003e and \u003ccode\u003e_\u003c/code\u003e with a backslash but never escape a backslash already present in the input. Because backslash is the default \u003ccode\u003eLIKE\u003c/code\u003e escape character, the escaping defeats itself: the input \u003ccode\u003e\\%\u003c/code\u003e becomes the pattern fragment \u003ccode\u003e\\\\%\u003c/code\u003e, where \u003ccode\u003e\\\\\u003c/code\u003e is a literal backslash and the attacker\u0027s \u003ccode\u003e%\u003c/code\u003e remains a live wildcard. The search value stays parameterized, so this is confined to the LIKE pattern grammar rather than full SQL. An attacker can widen matches to probe values, slip past a negated \u003ccode\u003econtains(...)\u003c/code\u003e guard, or crash the query with a trailing lone backslash.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash_sql: from 0.1.1-rc.10 before 0.7.1.\u003c/p\u003e"
            },
            {
              "base64": false,
              "type": "text/markdown",
              "value": "Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash_sql allows a user who supplies a search term to `contains/2`, `string_starts_with/2`, or `string_ends_with/2` to inject live SQL `LIKE` wildcards, turning a literal substring search into an attacker-controlled pattern match.\n\nThe escape helpers in `AshSql.Expr` prefix `%` and `_` with a backslash but never escape a backslash already present in the input. Because backslash is the default `LIKE` escape character, the escaping defeats itself: the input `\\%` becomes the pattern fragment `\\\\%`, where `\\\\` is a literal backslash and the attacker\u0027s `%` remains a live wildcard. The search value stays parameterized, so this is confined to the LIKE pattern grammar rather than full SQL. An attacker can widen matches to probe values, slip past a negated `contains(...)` guard, or crash the query with a trailing lone backslash.\n\nThis issue affects ash_sql: from 0.1.1-rc.10 before 0.7.1."
            }
          ],
          "value": "Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash_sql allows a user who supplies a search term to contains/2, string_starts_with/2, or string_ends_with/2 to inject live SQL LIKE wildcards, turning a literal substring search into an attacker-controlled pattern match.\n\nThe escape helpers in AshSql.Expr prefix % and _ with a backslash but never escape a backslash already present in the input. Because backslash is the default LIKE escape character, the escaping defeats itself: the input \\% becomes the pattern fragment \\\\%, where \\\\ is a literal backslash and the attacker\u0027s % remains a live wildcard. The search value stays parameterized, so this is confined to the LIKE pattern grammar rather than full SQL. An attacker can widen matches to probe values, slip past a negated contains(...) guard, or crash the query with a trailing lone backslash.\n\nThis issue affects ash_sql: from 0.1.1-rc.10 before 0.7.1."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-116",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-116 Excavation"
            }
          ]
        }
      ],
      "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": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-943",
              "description": "CWE-943 Improper Neutralization of Special Elements in Data Query Logic",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-30T11:55:20.331Z",
        "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "shortName": "EEF"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "related"
          ],
          "url": "https://github.com/ash-project/ash_sql/security/advisories/GHSA-5jgp-7mhc-6qqh"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://cna.erlef.org/cves/CVE-2026-78691.html"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://osv.dev/vulnerability/EEF-CVE-2026-78691"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/ash-project/ash_sql/commit/d95c55c64b1b42cc2fd30211a4913f3145156cd4"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Unescaped backslash allows LIKE wildcard injection in AshSql string search"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
    "assignerShortName": "EEF",
    "cveId": "CVE-2026-78691",
    "datePublished": "2026-08-30T11:55:20.331Z",
    "dateReserved": "2026-08-30T05:45:01.818Z",
    "dateUpdated": "2026-08-30T11:55:20.331Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-78691\",\"sourceIdentifier\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"published\":\"2026-08-30T12:17:18.550\",\"lastModified\":\"2026-08-30T12:17:18.550\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash_sql allows a user who supplies a search term to contains/2, string_starts_with/2, or string_ends_with/2 to inject live SQL LIKE wildcards, turning a literal substring search into an attacker-controlled pattern match.\\n\\nThe escape helpers in AshSql.Expr prefix % and _ with a backslash but never escape a backslash already present in the input. Because backslash is the default LIKE escape character, the escaping defeats itself: the input \\\\% becomes the pattern fragment \\\\\\\\%, where \\\\\\\\ is a literal backslash and the attacker\u0027s % remains a live wildcard. The search value stays parameterized, so this is confined to the LIKE pattern grammar rather than full SQL. An attacker can widen matches to probe values, slip past a negated contains(...) guard, or crash the query with a trailing lone backslash.\\n\\nThis issue affects ash_sql: from 0.1.1-rc.10 before 0.7.1.\"}],\"affected\":[{\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"affectedData\":[{\"vendor\":\"ash-project\",\"product\":\"ash_sql\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://repo.hex.pm\",\"packageName\":\"ash_sql\",\"cpes\":[\"cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*\"],\"modules\":[\"\u0027Elixir.AshSql.Expr\u0027\"],\"programFiles\":[\"lib/expr.ex\"],\"programRoutines\":[{\"name\":\"\u0027Elixir.AshSql.Expr\u0027:escape_contains/1\"},{\"name\":\"\u0027Elixir.AshSql.Expr\u0027:escape_starts_with/1\"},{\"name\":\"\u0027Elixir.AshSql.Expr\u0027:escape_ends_with/1\"}],\"repo\":\"https://github.com/ash-project/ash_sql\",\"packageURL\":\"pkg:hex/ash_sql\",\"versions\":[{\"version\":\"0.1.1-rc.10\",\"lessThan\":\"0.7.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"ash-project\",\"product\":\"ash_sql\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://github.com\",\"packageName\":\"ash-project/ash_sql\",\"cpes\":[\"cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*\"],\"modules\":[\"\u0027Elixir.AshSql.Expr\u0027\"],\"programFiles\":[\"lib/expr.ex\"],\"programRoutines\":[{\"name\":\"\u0027Elixir.AshSql.Expr\u0027:escape_contains/1\"},{\"name\":\"\u0027Elixir.AshSql.Expr\u0027:escape_starts_with/1\"},{\"name\":\"\u0027Elixir.AshSql.Expr\u0027:escape_ends_with/1\"}],\"repo\":\"https://github.com/ash-project/ash_sql\",\"packageURL\":\"pkg:github/ash-project/ash_sql\",\"versions\":[{\"version\":\"cfc7da474c5be2190fd62664a83a689377a8d512\",\"lessThan\":\"d95c55c64b1b42cc2fd30211a4913f3145156cd4\",\"versionType\":\"git\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":2.1,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-943\"}]}],\"references\":[{\"url\":\"https://cna.erlef.org/cves/CVE-2026-78691.html\",\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\"},{\"url\":\"https://github.com/ash-project/ash_sql/commit/d95c55c64b1b42cc2fd30211a4913f3145156cd4\",\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\"},{\"url\":\"https://github.com/ash-project/ash_sql/security/advisories/GHSA-5jgp-7mhc-6qqh\",\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\"},{\"url\":\"https://osv.dev/vulnerability/EEF-CVE-2026-78691\",\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\"}]}}"
  }
}

FKIE_CVE-2026-78691

Vulnerability from fkie_nvd - Published: 2026-08-30 12:17 - Updated: 2026-08-30 12:17

Severity

2.1 (Low) - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-78691.html
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/ash-project/ash_sql/commit/d95c55c64b1b42cc2fd30211a4913f3145156cd4
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/ash-project/ash_sql/security/advisories/GHSA-5jgp-7mhc-6qqh
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-78691

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.AshSql.Expr\u0027"
          ],
          "packageName": "ash_sql",
          "packageURL": "pkg:hex/ash_sql",
          "product": "ash_sql",
          "programFiles": [
            "lib/expr.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_contains/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_starts_with/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_ends_with/1"
            }
          ],
          "repo": "https://github.com/ash-project/ash_sql",
          "vendor": "ash-project",
          "versions": [
            {
              "lessThan": "0.7.1",
              "status": "affected",
              "version": "0.1.1-rc.10",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.AshSql.Expr\u0027"
          ],
          "packageName": "ash-project/ash_sql",
          "packageURL": "pkg:github/ash-project/ash_sql",
          "product": "ash_sql",
          "programFiles": [
            "lib/expr.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_contains/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_starts_with/1"
            },
            {
              "name": "\u0027Elixir.AshSql.Expr\u0027:escape_ends_with/1"
            }
          ],
          "repo": "https://github.com/ash-project/ash_sql",
          "vendor": "ash-project",
          "versions": [
            {
              "lessThan": "d95c55c64b1b42cc2fd30211a4913f3145156cd4",
              "status": "affected",
              "version": "cfc7da474c5be2190fd62664a83a689377a8d512",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash_sql allows a user who supplies a search term to contains/2, string_starts_with/2, or string_ends_with/2 to inject live SQL LIKE wildcards, turning a literal substring search into an attacker-controlled pattern match.\n\nThe escape helpers in AshSql.Expr prefix % and _ with a backslash but never escape a backslash already present in the input. Because backslash is the default LIKE escape character, the escaping defeats itself: the input \\% becomes the pattern fragment \\\\%, where \\\\ is a literal backslash and the attacker\u0027s % remains a live wildcard. The search value stays parameterized, so this is confined to the LIKE pattern grammar rather than full SQL. An attacker can widen matches to probe values, slip past a negated contains(...) guard, or crash the query with a trailing lone backslash.\n\nThis issue affects ash_sql: from 0.1.1-rc.10 before 0.7.1."
    }
  ],
  "id": "CVE-2026-78691",
  "lastModified": "2026-08-30T12:17:18.550",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-30T12:17:18.550",
  "references": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://cna.erlef.org/cves/CVE-2026-78691.html"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/ash-project/ash_sql/commit/d95c55c64b1b42cc2fd30211a4913f3145156cd4"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/ash-project/ash_sql/security/advisories/GHSA-5jgp-7mhc-6qqh"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-78691"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-943"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-78691 (GCVE-0-2026-78691)

FKIE_CVE-2026-78691

Tags

Sightings

Nomenclature