{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-115779", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-23T13:28:51.847Z", "datePublished": "2026-11-03T20:40:19.864Z", "dateUpdated": "2026-11-03T21:26:55.431Z"}, "containers": {"cna": {"title": "Effect: Cookie attribute injection via domain, path, and name fields in @effect/platform makeCookie()", "problemTypes": [{"descriptions": [{"cweId": "CWE-74", "lang": "en", "description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/Effect-TS/effect/security/advisories/GHSA-chp3-j5qr-2vfr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Effect-TS/effect/security/advisories/GHSA-chp3-j5qr-2vfr"}, {"name": "https://github.com/Effect-TS/effect/pull/6763", "tags": ["x_refsource_MISC"], "url": "https://github.com/Effect-TS/effect/pull/6763"}, {"name": "https://github.com/Effect-TS/effect/pull/6765", "tags": ["x_refsource_MISC"], "url": "https://github.com/Effect-TS/effect/pull/6765"}, {"name": "https://github.com/Effect-TS/effect/commit/4a57af24011db1d66e947289d2f7ffc2074696d2", "tags": ["x_refsource_MISC"], "url": "https://github.com/Effect-TS/effect/commit/4a57af24011db1d66e947289d2f7ffc2074696d2"}, {"name": "https://github.com/Effect-TS/effect/commit/5859b373b9be04d5037a594196b4743ad80379bd", "tags": ["x_refsource_MISC"], "url": "https://github.com/Effect-TS/effect/commit/5859b373b9be04d5037a594196b4743ad80379bd"}, {"name": "https://github.com/Effect-TS/effect/releases/tag/@effect/platform@0.97.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/Effect-TS/effect/releases/tag/@effect/platform@0.97.1"}, {"name": "https://github.com/Effect-TS/effect/releases/tag/effect@4.0.0-beta.103", "tags": ["x_refsource_MISC"], "url": "https://github.com/Effect-TS/effect/releases/tag/effect@4.0.0-beta.103"}], "affected": [{"vendor": "Effect-TS", "product": "effect", "versions": [{"version": ">= 4.0.0-beta.0, < 4.0.0-beta.103", "status": "affected"}]}, {"vendor": "@effect", "product": "platform", "versions": [{"version": ">= 0.1.0, < 0.97.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-03T20:40:19.864Z"}, "descriptions": [{"lang": "en", "value": "Effect is a TypeScript framework that consists of several packages that work together to help build TypeScript applications. From @effect/platform 0.1.0 until 0.97.1 and effect 4.0.0-beta.0 until 4.0.0-beta.103, the name, domain, and path fields passed to makeCookie() allow semicolon delimiters that serializeCookie() writes verbatim into Set-Cookie headers. A caller that supplies attacker-controlled values can append cookie attributes, including a broader Domain or, when the caller has not set those options itself, SameSite=None or Max-Age. Encoded cookie values and CR or LF characters remain unaffected. This can widen a cookie's scope or add otherwise-unset cookie attributes. This issue is fixed in @effect/platform 0.97.1 and effect 4.0.0-beta.103."}], "source": {"advisory": "GHSA-chp3-j5qr-2vfr", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-03T21:26:42.883505Z", "id": "CVE-2026-115779", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-03T21:26:55.431Z"}}]}}

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{"affected": [{"affectedData": [{"product": "effect", "vendor": "Effect-TS", "versions": [{"status": "affected", "version": ">= 4.0.0-beta.0, < 4.0.0-beta.103"}]}, {"product": "platform", "vendor": "@effect", "versions": [{"status": "affected", "version": ">= 0.1.0, < 0.97.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Effect is a TypeScript framework that consists of several packages that work together to help build TypeScript applications. From @effect/platform 0.1.0 until 0.97.1 and effect 4.0.0-beta.0 until 4.0.0-beta.103, the name, domain, and path fields passed to makeCookie() allow semicolon delimiters that serializeCookie() writes verbatim into Set-Cookie headers. A caller that supplies attacker-controlled values can append cookie attributes, including a broader Domain or, when the caller has not set those options itself, SameSite=None or Max-Age. Encoded cookie values and CR or LF characters remain unaffected. This can widen a cookie's scope or add otherwise-unset cookie attributes. This issue is fixed in @effect/platform 0.97.1 and effect 4.0.0-beta.103."}], "id": "CVE-2026-115779", "lastModified": "2026-11-03T22:19:17.923", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "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": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/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": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-115779", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-03T21:26:42.883505Z", "version": "2.0.3"}}]}, "published": "2026-11-03T21:17:02.190", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Effect-TS/effect/commit/4a57af24011db1d66e947289d2f7ffc2074696d2"}, {"source": "security-advisories@github.com", "url": "https://github.com/Effect-TS/effect/commit/5859b373b9be04d5037a594196b4743ad80379bd"}, {"source": "security-advisories@github.com", "url": "https://github.com/Effect-TS/effect/pull/6763"}, {"source": "security-advisories@github.com", "url": "https://github.com/Effect-TS/effect/pull/6765"}, {"source": "security-advisories@github.com", "url": "https://github.com/Effect-TS/effect/releases/tag/@effect/platform@0.97.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/Effect-TS/effect/releases/tag/effect@4.0.0-beta.103"}, {"source": "security-advisories@github.com", "url": "https://github.com/Effect-TS/effect/security/advisories/GHSA-chp3-j5qr-2vfr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-74"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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