Vulnerability-Lookup

GHSA-XCGM-R5H9-7989

Vulnerability from github – Published: 2026-06-15 20:11 – Updated: 2026-06-15 20:11

Summary

aiohttp: Incomplete websocket frame payloads bypass memory limits

Details

Summary

If an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use.

Impact

If a web application has WebSocket endpoints, it may be possible for an attacker to execute a DoS attack through excessive memory use.

Patch: https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d

Severity

6.6 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.14.0"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "aiohttp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.14.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54274"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-15T20:11:22Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nIf an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use.\n\n### Impact\n\nIf a web application has WebSocket endpoints, it may be possible for an attacker to execute a DoS attack through excessive memory use.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d",
  "id": "GHSA-xcgm-r5h9-7989",
  "modified": "2026-06-15T20:11:22Z",
  "published": "2026-06-15T20:11:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xcgm-r5h9-7989"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aio-libs/aiohttp"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "aiohttp: Incomplete websocket frame payloads bypass memory limits"
}

CVE-2026-54274 (GCVE-0-2026-54274)

Vulnerability from cvelistv5 – Published: 2026-06-22 16:33 – Updated: 2026-06-22 18:14

Title

AIOHTTP: Incomplete websocket frame payloads bypass memory limits

Summary

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1.

Severity

6.6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/aio-libs/aiohttp/security/advi…	x_refsource_CONFIRM
https://github.com/aio-libs/aiohttp/commit/14b6ee…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
aio-libs	aiohttp	Affected: < 3.14.1

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54274",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-22T18:11:47.837374Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
          "dateUpdated": "2026-06-22T18:14:44.845Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "aiohttp",
          "vendor": "aio-libs",
          "versions": [
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            }
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
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          "descriptions": [
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          "tags": [
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          ],
          "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xcgm-r5h9-7989"
        },
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          "tags": [
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          "url": "https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d"
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      "source": {
        "advisory": "GHSA-xcgm-r5h9-7989",
        "discovery": "UNKNOWN"
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      "title": "AIOHTTP: Incomplete websocket frame payloads bypass memory limits"
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    "datePublished": "2026-06-22T16:33:37.789Z",
    "dateReserved": "2026-06-12T17:13:32.280Z",
    "dateUpdated": "2026-06-22T18:14:44.845Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-XCGM-R5H9-7989

Summary

Impact

CVE-2026-54274 (GCVE-0-2026-54274)

Tags

Sightings

Nomenclature