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CVE-2026-85077 (GCVE-0-2026-85077)

Vulnerability from cvelistv5 – Published: 2026-09-17 14:26 – Updated: 2026-09-17 14:26
VLAI
Title
Sanic: HTTP response header injection via missing CR/LF validation in Sanic HTTP/1.1 responses
Summary
Sanic is an opensource python web server/framework. Prior to version 24.12.1, and in version 25.12.0, the HTTP/1.1 response pipeline in sanic/response/types.py serializes response header names and values without rejecting carriage-return or line-feed characters. Applications that place attacker-controlled data in response.headers, file(..., filename=...), or cookie path and domain attributes can therefore emit injected headers and may split responses. Depending on application and proxy behavior, this can enable session fixation through injected cookies, cache poisoning, or security-header corruption. This issue is fixed in versions 24.12.1 and 25.12.1.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
CWE
  • CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
Impacted products
Vendor Product Version CPE status
sanic-org sanic Affected: < 24.12.1
Affected: >= 25.12.0, < 25.12.1
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{
  "containers": {
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      "affected": [
        {
          "product": "sanic",
          "vendor": "sanic-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 24.12.1"
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        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-113",
              "description": "CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers (\u0027HTTP Request/Response Splitting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T14:26:39.826Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
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          "url": "https://github.com/sanic-org/sanic/pull/3165"
        },
        {
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22"
        },
        {
          "name": "https://github.com/sanic-org/sanic/commit/9a95bb1c187558949606b915f5162c15f2db781b",
          "tags": [
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          "url": "https://github.com/sanic-org/sanic/commit/9a95bb1c187558949606b915f5162c15f2db781b"
        },
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          "name": "https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6"
        },
        {
          "name": "https://github.com/sanic-org/sanic/releases/tag/v24.12.1",
          "tags": [
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          "url": "https://github.com/sanic-org/sanic/releases/tag/v24.12.1"
        },
        {
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sanic-org/sanic/releases/tag/v25.12.1"
        }
      ],
      "source": {
        "advisory": "GHSA-m64h-22vf-48wm",
        "discovery": "UNKNOWN"
      },
      "title": "Sanic: HTTP response header injection via missing CR/LF validation in Sanic HTTP/1.1 responses"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-85077",
    "datePublished": "2026-09-17T14:26:39.826Z",
    "dateReserved": "2026-09-02T21:21:01.776Z",
    "dateUpdated": "2026-09-17T14:26:39.826Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-85077\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-09-17T15:16:54.990\",\"lastModified\":\"2026-09-17T15:16:54.990\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Sanic is an opensource python web server/framework. Prior to version 24.12.1, and in version 25.12.0, the HTTP/1.1 response pipeline in sanic/response/types.py serializes response header names and values without rejecting carriage-return or line-feed characters. Applications that place attacker-controlled data in response.headers, file(..., filename=...), or cookie path and domain attributes can therefore emit injected headers and may split responses. Depending on application and proxy behavior, this can enable session fixation through injected cookies, cache poisoning, or security-header corruption. This issue is fixed in versions 24.12.1 and 25.12.1.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"sanic-org\",\"product\":\"sanic\",\"versions\":[{\"version\":\"\u003c 24.12.1\",\"status\":\"affected\"},{\"version\":\"\u003e= 25.12.0, \u003c 25.12.1\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-113\"}]}],\"references\":[{\"url\":\"https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/sanic-org/sanic/commit/9a95bb1c187558949606b915f5162c15f2db781b\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/sanic-org/sanic/pull/3164\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/sanic-org/sanic/pull/3165\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/sanic-org/sanic/releases/tag/v24.12.1\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/sanic-org/sanic/releases/tag/v25.12.1\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/sanic-org/sanic/security/advisories/GHSA-m64h-22vf-48wm\",\"source\":\"security-advisories@github.com\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-17T21:15:42+00:00",
      "cve": "CVE-2026-85077",
      "id": "CVE-2026-85077",
      "initial_release_date": "2026-09-17T14:26:39.826000+00:00",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "sanic: Sanic: HTTP response header injection leading to session fixation or cache poisoning",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85077.json",
      "version": "3"
    }
  }
}



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