CVE-2026-78693 (GCVE-0-2026-78693)

Vulnerability from cvelistv5 – Published: 2026-08-30 18:28 – Updated: 2026-08-31 15:58
VLAI
Title
Incomplete redaction re-attaches the original error path in AshGraphql, leaking internal field names
Summary
Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_graphql allows a remote client to read internal field names that an application configured its error_handler to redact. In AshGraphql.Errors, each error is passed to the configured error_handler and the returned map is merged with the pre-handler path via Map.put_new(handled, :path, path). Because put_new defers to the handler only when the handler itself set :path, a sanitizing handler that returns a fresh map or deletes :path has that decision reverted. The re-injected path comes from build_error_path/5, which falls back to raw internal Ash attribute and argument names when no field_names mapping is configured. A validation failure on a non-exposed or nested field therefore returns internal names in the GraphQL error path, defeating the application's redaction. This issue affects ash_graphql: from 1.9.0 before 1.11.0.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 15:58 UTC
CWE
  • CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
Impacted products
Vendor Product Version CPE status
ash-project ash_graphql Affected: 1.9.0 , < 1.11.0 (semver)
    cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*
Create a notification for this product.
ash-project ash_graphql Affected: 6d2d8d995906d68cc245d209a9b3f9853405eb61 , < 78e90d369f09f44c534816de541e60841066a467 (git)
    cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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                  "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\u003eGeneration of Error Message Containing Sensitive Information vulnerability in ash-project ash_graphql allows a remote client to read internal field names that an application configured its \u003ccode\u003eerror_handler\u003c/code\u003e to redact.\u003c/p\u003e\n\u003cp\u003eIn \u003ccode\u003eAshGraphql.Errors\u003c/code\u003e, each error is passed to the configured \u003ccode\u003eerror_handler\u003c/code\u003e and the returned map is merged with the pre-handler path via \u003ccode\u003eMap.put_new(handled, :path, path)\u003c/code\u003e. Because \u003ccode\u003eput_new\u003c/code\u003e defers to the handler only when the handler itself set \u003ccode\u003e:path\u003c/code\u003e, a sanitizing handler that returns a fresh map or deletes \u003ccode\u003e:path\u003c/code\u003e has that decision reverted. The re-injected path comes from \u003ccode\u003ebuild_error_path/5\u003c/code\u003e, which falls back to raw internal Ash attribute and argument names when no \u003ccode\u003efield_names\u003c/code\u003e mapping is configured. A validation failure on a non-exposed or nested field therefore returns internal names in the GraphQL error \u003ccode\u003epath\u003c/code\u003e, defeating the application\u0027s redaction.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash_graphql: from 1.9.0 before 1.11.0.\u003c/p\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_graphql allows a remote client to read internal field names that an application configured its `error_handler` to redact.\n\nIn `AshGraphql.Errors`, each error is passed to the configured `error_handler` and the returned map is merged with the pre-handler path via `Map.put_new(handled, :path, path)`. Because `put_new` defers to the handler only when the handler itself set `:path`, a sanitizing handler that returns a fresh map or deletes `:path` has that decision reverted. The re-injected path comes from `build_error_path/5`, which falls back to raw internal Ash attribute and argument names when no `field_names` mapping is configured. A validation failure on a non-exposed or nested field therefore returns internal names in the GraphQL error `path`, defeating the application\u0027s redaction.\n\nThis issue affects ash_graphql: from 1.9.0 before 1.11.0."
                }
              ],
              "value": "Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_graphql allows a remote client to read internal field names that an application configured its error_handler to redact.\n\nIn AshGraphql.Errors, each error is passed to the configured error_handler and the returned map is merged with the pre-handler path via Map.put_new(handled, :path, path). Because put_new defers to the handler only when the handler itself set :path, a sanitizing handler that returns a fresh map or deletes :path has that decision reverted. The re-injected path comes from build_error_path/5, which falls back to raw internal Ash attribute and argument names when no field_names mapping is configured. A validation failure on a non-exposed or nested field therefore returns internal names in the GraphQL error path, defeating the application\u0027s redaction.\n\nThis issue affects ash_graphql: from 1.9.0 before 1.11.0."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-54",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-54 Query System for Information"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 6.9,
                "baseSeverity": "MEDIUM",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/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-209",
                  "description": "CWE-209 Generation of Error Message Containing Sensitive Information",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-30T18:28:35.282Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory",
                "related"
              ],
              "url": "https://github.com/ash-project/ash_graphql/security/advisories/GHSA-ppr2-g9h8-w7qp"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://cna.erlef.org/cves/CVE-2026-78693.html"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-78693"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/ash-project/ash_graphql/commit/78e90d369f09f44c534816de541e60841066a467"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Incomplete redaction re-attaches the original error path in AshGraphql, leaking internal field names"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-78693",
        "datePublished": "2026-08-30T18:28:35.282Z",
        "dateReserved": "2026-08-30T15:30:02.101Z",
        "dateUpdated": "2026-08-30T18:28:35.282Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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