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

Vulnerability from cvelistv5 – Published: 2023-11-30 06:56 – Updated: 2026-06-23 17:19
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
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
aio-libs aiohttp Affected: < 3.9.0
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2\", \"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/pull/7835/files\", \"name\": \"https://github.com/aio-libs/aiohttp/pull/7835/files\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\", \"name\": \"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\", \"name\": \"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"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/\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-04T18:19:34.328Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-49081\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2023-11-30T14:30:34.491239Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-23T17:08:51.632Z\"}}], \"cna\": {\"title\": \"aiohttp\u0027s ClientSession is vulnerable to CRLF injection via version\", \"source\": {\"advisory\": \"GHSA-q3qx-c6g2-7pw2\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 7.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"aio-libs\", \"product\": \"aiohttp\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 3.9.0\"}]}], \"references\": [{\"url\": \"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2\", \"name\": \"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-q3qx-c6g2-7pw2\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/aio-libs/aiohttp/pull/7835/files\", \"name\": \"https://github.com/aio-libs/aiohttp/pull/7835/files\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\", \"name\": \"https://github.com/aio-libs/aiohttp/commit/1e86b777e61cf4eefc7d92fa57fa19dcc676013b\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\", \"name\": \"https://gist.github.com/jnovikov/184afb593d9c2114d77f508e0ccd508e\", \"tags\": [\"x_refsource_MISC\"]}], \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-20\", \"description\": \"CWE-20: Improper Input Validation\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2024-01-29T14:10:37.384Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-49081\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-23T17:19:11.870Z\", \"dateReserved\": \"2023-11-21T18:57:30.428Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2023-11-30T06:56:26.348Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.