CVE-2023-49081 (GCVE-0-2023-49081)

Vulnerability from cvelistv5 – Published: 2023-11-30 06:56 – Updated: 2025-11-04 18:19
VLAI?
Title
aiohttp's ClientSession is vulnerable to CRLF injection via version
Summary
aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0.
Severity ?
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
aio-libs aiohttp Affected: < 3.9.0
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T18:19:34.328Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2"
          },
          {
            "name": "https://github.com/aio-libs/aiohttp/pull/7835/files",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/aio-libs/aiohttp/pull/7835/files"
          },
          {
            "name": "https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b"
          },
          {
            "name": "https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html"
          },
          {
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSYWMP64ZFCTC3VO6RY6EC6VSSMV6I3A/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "aiohttp",
          "vendor": "aio-libs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.9.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-29T14:10:37.384Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2"
        },
        {
          "name": "https://github.com/aio-libs/aiohttp/pull/7835/files",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/aio-libs/aiohttp/pull/7835/files"
        },
        {
          "name": "https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b"
        },
        {
          "name": "https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e"
        }
      ],
      "source": {
        "advisory": "GHSA-q3qx-c6g2-7pw2",
        "discovery": "UNKNOWN"
      },
      "title": "aiohttp\u0027s ClientSession is vulnerable to CRLF injection via version"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-49081",
    "datePublished": "2023-11-30T06:56:26.348Z",
    "dateReserved": "2023-11-21T18:57:30.428Z",
    "dateUpdated": "2025-11-04T18:19:34.328Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-49081",
      "date": "2026-05-20",
      "epss": "0.00457",
      "percentile": "0.64112"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"3.9.0\", \"matchCriteriaId\": \"B601D31B-56AB-4C39-8CC0-12CFA373E53A\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0.\"}, {\"lang\": \"es\", \"value\": \"aiohttp es un framework cliente/servidor HTTP as\\u00edncrono para asyncio y Python. Una validaci\\u00f3n incorrecta hizo posible que un atacante modificara la solicitud HTTP (por ejemplo, para insertar un nuevo encabezado) o creara una nueva solicitud HTTP si el atacante controla la versi\\u00f3n HTTP. La vulnerabilidad s\\u00f3lo ocurre si el atacante puede controlar la versi\\u00f3n HTTP de la solicitud. Este problema se solucion\\u00f3 en la versi\\u00f3n 3.9.0.\"}]",
      "id": "CVE-2023-49081",
      "lastModified": "2024-11-21T08:32:46.897",
      "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:C/C:L/I:L/A:N\", \"baseScore\": 7.2, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 2.7}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 1.4}]}",
      "published": "2023-11-30T07:15:08.723",
      "references": "[{\"url\": \"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\", \"source\": \"security-advisories@github.com\", \"tags\": [\"Exploit\", \"Third Party Advisory\"]}, {\"url\": \"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\", \"source\": \"security-advisories@github.com\"}, {\"url\": \"https://github.com/aio-libs/aiohttp/pull/7835/files\", \"source\": \"security-advisories@github.com\"}, {\"url\": \"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2\", \"source\": \"security-advisories@github.com\", \"tags\": [\"Exploit\", \"Vendor Advisory\"]}, {\"url\": \"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Third Party Advisory\"]}, {\"url\": \"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://github.com/aio-libs/aiohttp/pull/7835/files\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Vendor Advisory\"]}]",
      "sourceIdentifier": "security-advisories@github.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"security-advisories@github.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-20\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-Other\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-49081\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2023-11-30T07:15:08.723\",\"lastModified\":\"2025-11-04T19:16:08.550\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0.\"},{\"lang\":\"es\",\"value\":\"aiohttp es un framework cliente/servidor HTTP as\u00edncrono para asyncio y Python. Una validaci\u00f3n incorrecta hizo posible que un atacante modificara la solicitud HTTP (por ejemplo, para insertar un nuevo encabezado) o creara una nueva solicitud HTTP si el atacante controla la versi\u00f3n HTTP. La vulnerabilidad s\u00f3lo ocurre si el atacante puede controlar la versi\u00f3n HTTP de la solicitud. Este problema se solucion\u00f3 en la versi\u00f3n 3.9.0.\"}],\"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:C/C:L/I:L/A:N\",\"baseScore\":7.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":2.7},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"3.9.0\",\"matchCriteriaId\":\"B601D31B-56AB-4C39-8CC0-12CFA373E53A\"}]}]}],\"references\":[{\"url\":\"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/aio-libs/aiohttp/pull/7835/files\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/aio-libs/aiohttp/pull/7835/files\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSYWMP64ZFCTC3VO6RY6EC6VSSMV6I3A/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.



Detection rules are retrieved from Rulezet.