Vulnerability-Lookup

CVE-2026-107349 (GCVE-0-2026-107349)

Vulnerability from cvelistv5 – Published: 2026-10-14 17:34 – Updated: 2026-10-16 20:19

Title

Infinite loop on empty option name in startup options parameter in PgBouncer

Summary

An infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service. A StartupMessage whose options parameter contains an empty parameter name, such as "-c=", makes the ignore_startup_parameters list lookup loop forever. Because PgBouncer serves all clients from a single process, this saturates a CPU core and makes PgBouncer unresponsive to all clients until the process is restarted.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 20:19 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-400 - Uncontrolled Resource Consumption

Assigner

PostgreSQL CNA under the redhat root

CNA scorecard C 67/100 over 88 records in the last 180 days details

References

1 reference

URL	Tags
https://www.pgbouncer.org/changelog.html

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	PgBouncer	Affected: 1.20.0 , < 1.26.1 (semver)

Credits

Thanks to Jackds Security (@jackds-security) for finding and reporting this issue.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-107349

Vulnerability from fkie_nvd - Published: 2026-10-14 18:17 - Updated: 2026-10-16 21:17

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	f86ef6dc-4d3a-42ad-8f28-e6d5547a5007	https://www.pgbouncer.org/changelog.html

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "PgBouncer",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "1.26.1",
              "status": "affected",
              "version": "1.20.0",
              "versionType": "semver"
            }
          ]
        }
      ],
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    }
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GHSA-H8CJ-P2H5-HM79

Vulnerability from github – Published: 2026-10-14 18:32 – Updated: 2026-10-14 18:32

Details

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
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    "CVE-2026-107349"
  ],
  "database_specific": {
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      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
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    "severity": "HIGH"
  },
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  "id": "GHSA-h8cj-p2h5-hm79",
  "modified": "2026-10-14T18:32:29Z",
  "published": "2026-10-14T18:32:29Z",
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    },
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      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-107349

Vulnerability from csaf_microsoft - Published: 2026-10-16 01:05 - Updated: 2026-10-17 01:48

Summary

Infinite loop on empty option name in startup options parameter in PgBouncer

Scope

1 vulnerability in this advisory, including CVE-2026-107349.

CVE-2026-107349

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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CVE-2026-107349 (GCVE-0-2026-107349)

FKIE_CVE-2026-107349

GHSA-H8CJ-P2H5-HM79

MSRC_CVE-2026-107349

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour