FKIE_CVE-2026-115779

Vulnerability from fkie_nvd - Published: 2026-11-03 21:17 - Updated: 2026-11-03 22:19
Severity
6.3 (Medium) - 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
Summary
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.
References
security-advisories@github.comhttps://github.com/Effect-TS/effect/commit/4a57af24011db1d66e947289d2f7ffc2074696d2
security-advisories@github.comhttps://github.com/Effect-TS/effect/commit/5859b373b9be04d5037a594196b4743ad80379bd
security-advisories@github.comhttps://github.com/Effect-TS/effect/pull/6763
security-advisories@github.comhttps://github.com/Effect-TS/effect/pull/6765
security-advisories@github.comhttps://github.com/Effect-TS/effect/releases/tag/@effect/platform@0.97.1
security-advisories@github.comhttps://github.com/Effect-TS/effect/releases/tag/effect@4.0.0-beta.103
security-advisories@github.comhttps://github.com/Effect-TS/effect/security/advisories/GHSA-chp3-j5qr-2vfr
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "effect",
          "vendor": "Effect-TS",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.0.0-beta.0, \u003c 4.0.0-beta.103"
            }
          ]
        },
        {
          "product": "platform",
          "vendor": "@effect",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.1.0, \u003c 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\u0027s 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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