Vulnerability-Lookup

GHSA-G7JQ-J257-RWW2

Vulnerability from github – Published: 2026-05-27 03:30 – Updated: 2026-05-27 21:31

Details

In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently unresponsive with increasing CPU and memory consumption. An authenticated attacker can systematically exhaust all proxy-server workers, resulting in denial of service. The defect was introduced in Swift 2.36.0.

Severity

7.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-49017"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T02:16:34Z",
    "severity": "HIGH"
  },
  "details": "In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently unresponsive with increasing CPU and memory consumption. An authenticated attacker can systematically exhaust all proxy-server workers, resulting in denial of service. The defect was introduced in Swift 2.36.0.",
  "id": "GHSA-g7jq-j257-rww2",
  "modified": "2026-05-27T21:31:20Z",
  "published": "2026-05-27T03:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49017"
    },
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/bugs/2152205"
    },
    {
      "type": "WEB",
      "url": "https://review.opendev.org/c/openstack/swift/+/987957"
    },
    {
      "type": "WEB",
      "url": "https://review.opendev.org/c/openstack/swift/+/988093"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/27/9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-49017 (GCVE-0-2026-49017)

Vulnerability from cvelistv5 – Published: 2026-05-27 01:57 – Updated: 2026-05-27 18:46

Summary

Severity

7.1 (High)


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

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

mitre

References

3 references

URL	Tags
https://bugs.launchpad.net/bugs/2152205	issue-tracking
https://review.opendev.org/c/openstack/swift/+/987957	patch
https://review.opendev.org/c/openstack/swift/+/988093	technical-description

Impacted products

1 product

Vendor	Product	Version
OpenStack	Swift	Affected: 2.36.0 , < 2.36.2 (semver) Affected: 2.37.0 , < 2.37.2 (semver)

Show details on NVD website

JSON

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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-27T13:52:48.762325Z",
                "version": "2.0.3"
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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-G7JQ-J257-RWW2

CVE-2026-49017 (GCVE-0-2026-49017)

Tags

Sightings

Nomenclature