CVE-2026-66838

{"id": "CVE-2026-66838", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66838", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-07T15:11:28.060095Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.9, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "affectedData": [{"cpes": ["cpe:2.3:a:elixir-ecto:postgrex:*:*:*:*:*:*:*:*"], "repo": "https://github.com/elixir-ecto/postgrex", "vendor": "elixir-ecto", "modules": ["'Elixir.Postgrex'", "'Elixir.Postgrex.Protocol'"], "product": "postgrex", "versions": [{"status": "affected", "version": "0.19.3", "lessThan": "0.22.4", "versionType": "semver"}], "packageURL": "pkg:hex/postgrex", "packageName": "postgrex", "programFiles": ["lib/postgrex.ex", "lib/postgrex/protocol.ex"], "collectionURL": "https://repo.hex.pm", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.Postgrex':stream/4"}, {"name": "'Elixir.Postgrex.Protocol':parse_describe_comment_msgs/3"}]}, {"cpes": ["cpe:2.3:a:elixir-ecto:postgrex:*:*:*:*:*:*:*:*"], "repo": "https://github.com/elixir-ecto/postgrex", "vendor": "elixir-ecto", "modules": ["'Elixir.Postgrex'", "'Elixir.Postgrex.Protocol'"], "product": "postgrex", "versions": [{"status": "affected", "changes": [{"at": "e1ecba618ddea4cee2556bd6ad9b6285e05f9d3c", "status": "unaffected"}, {"at": "4011be852c99dc61ddb98cb01aa41e8775a0e3dd", "status": "unaffected"}], "version": "4971a2722fa72f8e1b54a2c403cad4c43916e36d", "lessThan": "*", "versionType": "git"}], "packageURL": "pkg:github/elixir-ecto/postgrex", "packageName": "elixir-ecto/postgrex", "programFiles": ["lib/postgrex.ex", "lib/postgrex/protocol.ex"], "collectionURL": "https://github.com", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.Postgrex':stream/4"}, {"name": "'Elixir.Postgrex.Protocol':parse_describe_comment_msgs/3"}]}]}], "published": "2026-08-07T13:16:52.960", "references": [{"url": "https://cna.erlef.org/cves/CVE-2026-66838.html", "tags": ["Patch", "Third Party Advisory"], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/elixir-ecto/ecto/security/advisories/GHSA-3gww-3f36-2388", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/elixir-ecto/postgrex/commit/4011be852c99dc61ddb98cb01aa41e8775a0e3dd", "tags": ["Patch"], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/elixir-ecto/postgrex/commit/e1ecba618ddea4cee2556bd6ad9b6285e05f9d3c", "tags": ["Patch"], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-66838", "tags": ["Patch", "Third Party Advisory"], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/elixir-ecto/ecto/security/advisories/GHSA-3gww-3f36-2388", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "description": [{"lang": "en", "value": "CWE-89"}]}], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in elixir-ecto postgrex allows SQL Injection via the :comment option of Postgrex.stream/4. An attacker who can influence that value can close the comment delimiter with */ and extend the streamed statement with their own clauses, which execute under the connection's role. Ecto exposes the same option through Ecto.Repo.stream/2.\n\nPostgrex appends the comment by concatenating it into the statement text sent in the Parse message, without escaping or rejecting */. The option is validated by comment_not_present!/1 at every other execution point; stream/4 never calls it. Because Parse accepts a single command, the injection is confined to the streamed statement and further statements cannot be chained.\n\nThis issue affects postgrex: from 0.19.3 before 0.22.4."}, {"lang": "es", "value": "Vulnerabilidad de Neutralizaci\u00f3n Incorrecta de Elementos Especiales utilizados en un Comando SQL (\u2019inyecci\u00f3n SQL\u2019) en elixir-ecto postgrex permite la inyecci\u00f3n SQL a trav\u00e9s de la opci\u00f3n :comment de Postgrex.stream/4. Un atacante que puede influir en ese valor puede cerrar el delimitador de comentario con */ y extender la declaraci\u00f3n transmitida con sus propias cl\u00e1usulas, las cuales se ejecutan bajo el rol de la conexi\u00f3n. Ecto expone la misma opci\u00f3n a trav\u00e9s de Ecto.Repo.stream/2.\n\nPostgrex a\u00f1ade el comentario concaten\u00e1ndolo en el texto de la declaraci\u00f3n enviado en el mensaje Parse, sin escapar o rechazar */. La opci\u00f3n es validada por comment_not_present!/1 en cualquier otro punto de ejecuci\u00f3n; stream/4 nunca la llama. Debido a que Parse acepta un solo comando, la inyecci\u00f3n se limita a la declaraci\u00f3n transmitida y no se pueden encadenar declaraciones adicionales.\n\nEste problema afecta a postgrex: desde 0.19.3 antes de 0.22.4."}], "lastModified": "2026-10-24T16:10:00.153", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:elixir-ecto:postgrex:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "15B08735-414F-4252-9357-F1CA4081CAF5", "versionEndExcluding": "0.22.4", "versionStartIncluding": "0.19.3"}], "operator": "OR"}]}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}