CVE-2026-115779 (GCVE-0-2026-115779)

Vulnerability from cvelistv5 – Published: 2026-11-03 20:40 – Updated: 2026-11-03 21:26
VLAI
Title
Effect: Cookie attribute injection via domain, path, and name fields in @effect/platform makeCookie()
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.
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 21:26 UTC
CWE
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7913 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Effect-TS effect Affected: >= 4.0.0-beta.0, < 4.0.0-beta.103
guessed Create a notification for this product.
@effect platform Affected: >= 0.1.0, < 0.97.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-115779",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-03T21:26:42.883505Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-03T21:26:55.431Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
            "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",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-74",
              "description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T20:40:19.864Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "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"
        }
      ],
      "source": {
        "advisory": "GHSA-chp3-j5qr-2vfr",
        "discovery": "UNKNOWN"
      },
      "title": "Effect: Cookie attribute injection via domain, path, and name fields in @effect/platform makeCookie()"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115779",
    "datePublished": "2026-11-03T20:40:19.864Z",
    "dateReserved": "2026-10-23T13:28:51.847Z",
    "dateUpdated": "2026-11-03T21:26:55.431Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-115779",
      "date": "2026-11-04",
      "epss": "0.00627",
      "percentile": "0.50185"
    },
    "nvd": {
      "cve": {
        "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"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.