Vulnerability-Lookup

CVE-2026-47784 (GCVE-0-2026-47784)

Vulnerability from cvelistv5 – Published: 2026-05-20 05:45 – Updated: 2026-05-20 12:21

Summary

In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-20 12:20 UTC

CWE

CWE-208 - Observable Timing Discrepancy

Assigner

mitre mitre root

References

3 references

URL	Tags
https://github.com/memcached/memcached/commit/d13…
https://github.com/memcached/memcached/compare/1.…
https://github.com/memcached/memcached/wiki/Relea…

Impacted products

1 product

Vendor	Product	Version	CPE status
memcached	memcached	Affected: 0 , < 1.6.42 (semver) cpe:2.3:a:memcached:memcached::::::::

Show details on NVD website

JSON

To clipboard

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bit-memcached-2026-47784

Vulnerability from bitnami_vulndb

Published

2026-05-22 08:47

Modified

2026-09-08 08:34

Summary

Details

In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "memcached",
        "purl": "pkg:bitnami/memcached"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.42"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47784"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:*"
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    "severity": "High"
  },
  "details": "In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.",
  "id": "BIT-memcached-2026-47784",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-05-22T08:47:49.029Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/memcached/memcached/compare/1.6.41...1.6.42"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/memcached/memcached/wiki/ReleaseNotes1642"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47784"
    }
  ],
  "schema_version": "1.6.2"
}

FKIE_CVE-2026-47784

Vulnerability from fkie_nvd - Published: 2026-05-20 07:16 - Updated: 2026-07-24 10:10

Severity

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

Summary

In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

References

URL	Tags
cve@mitre.org	https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed	Patch
cve@mitre.org	https://github.com/memcached/memcached/compare/1.6.41...1.6.42	Release Notes
cve@mitre.org	https://github.com/memcached/memcached/wiki/ReleaseNotes1642	Release Notes

Impacted products

	Vendor	Product	Version
	memcached	memcached	*

JSON

To clipboard

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          "vendor": "memcached",
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GHSA-R4H3-4Q3V-2776

Vulnerability from github – Published: 2026-05-20 09:30 – Updated: 2026-05-20 09:30

Details

In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

Severity

8.1 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-47784"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-208"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-20T07:16:15Z",
    "severity": "HIGH"
  },
  "details": "In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.",
  "id": "GHSA-r4h3-4q3v-2776",
  "modified": "2026-05-20T09:30:34Z",
  "published": "2026-05-20T09:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47784"
    },
    {
      "type": "WEB",
      "url": "https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed"
    },
    {
      "type": "WEB",
      "url": "https://github.com/memcached/memcached/compare/1.6.41...1.6.42"
    },
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      "type": "WEB",
      "url": "https://github.com/memcached/memcached/wiki/ReleaseNotes1642"
    }
  ],
  "schema_version": "1.4.0",
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    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-47784

Vulnerability from csaf_microsoft - Published: 2026-05-02 00:00 - Updated: 2026-05-22 14:39

Summary

In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

Scope

1 vulnerability in this advisory, including CVE-2026-47784.

CVE-2026-47784

8.1 (High)


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

Fixed: 1 product Known affected: 1 product

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

Open the full advisory

RHSA-2026:23261

Vulnerability from csaf_redhat - Published: 2026-06-04 12:09 - Updated: 2026-09-07 22:43

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2026-47784.

CVE-2026-47784

A flaw was found in memcached. This vulnerability involves a timing side channel during SASL (Simple Authentication and Security Layer) password database authentication. A remote attacker could potentially exploit the timing differences in the password verification process to infer sensitive password data. This could lead to unauthorized access to the memcached instance.

5.9 (Medium)


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

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:23261

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SUSE-SU-2026:22022-1

Vulnerability from csaf_suse - Published: 2026-06-02 13:57 - Updated: 2026-06-02 13:57

Summary

Security update for memcached

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2026-47784.

CVE-2026-47784

8.1 (High)


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

Recommended: 16 products

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SUSE-SU-2026:2292-1

Vulnerability from csaf_suse - Published: 2026-06-08 08:51 - Updated: 2026-06-08 08:51

Summary

Security update for memcached

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2026-47784.

CVE-2026-47784

8.1 (High)


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

Recommended: 10 products

Open the full advisory

SUSE-SU-2026:2293-1

Vulnerability from csaf_suse - Published: 2026-06-08 08:52 - Updated: 2026-06-08 08:52

Summary

Security update for memcached

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2026-47784.

CVE-2026-47784

8.1 (High)


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

Recommended: 64 products

Open the full advisory

ubuntu-cve-2026-47784

Vulnerability from osv_ubuntu

Published

2026-05-20 07:16

Modified

2026-05-27 13:58

Summary

Details

In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

Severity

8.1 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-47784	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-47784	REPORT
	https://github.com/memcached/memcached/compare/1.…	REPORT
	https://github.com/memcached/memcached/wiki/Relea…	REPORT
	https://ubuntu.com/security/notices/USN-8320-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "memcached",
            "binary_version": "1.4.25-2ubuntu1.5+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "memcached",
        "purl": "pkg:deb/ubuntu/memcached@1.4.25-2ubuntu1.5+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.24-2ubuntu1",
        "1.4.25-1ubuntu2",
        "1.4.25-2ubuntu1",
        "1.4.25-2ubuntu1.2",
        "1.4.25-2ubuntu1.3",
        "1.4.25-2ubuntu1.4",
        "1.4.25-2ubuntu1.5",
        "1.4.25-2ubuntu1.5+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "memcached",
            "binary_version": "1.5.6-0ubuntu1.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "memcached",
        "purl": "pkg:deb/ubuntu/memcached@1.5.6-0ubuntu1.2+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.33-1ubuntu3",
        "1.5.4-1ubuntu2",
        "1.5.4-1ubuntu3",
        "1.5.6-0ubuntu1",
        "1.5.6-0ubuntu1.1",
        "1.5.6-0ubuntu1.2",
        "1.5.6-0ubuntu1.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "memcached",
            "binary_version": "1.5.22-2ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "memcached",
        "purl": "pkg:deb/ubuntu/memcached@1.5.22-2ubuntu0.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.10-0ubuntu3",
        "1.5.10-0ubuntu4",
        "1.5.19-2",
        "1.5.20-1",
        "1.5.22-1ubuntu1",
        "1.5.22-2",
        "1.5.22-2ubuntu0.1",
        "1.5.22-2ubuntu0.2",
        "1.5.22-2ubuntu0.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "memcached",
            "binary_version": "1.6.14-1ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "memcached",
        "purl": "pkg:deb/ubuntu/memcached@1.6.14-1ubuntu0.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.14-1ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.9+dfsg-1build1",
        "1.6.12+dfsg-2ubuntu1",
        "1.6.12+dfsg-3",
        "1.6.12+dfsg-4",
        "1.6.13-1",
        "1.6.14-1",
        "1.6.14-1ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "memcached",
            "binary_version": "1.6.24-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "memcached",
        "purl": "pkg:deb/ubuntu/memcached@1.6.24-1ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.24-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.21-1",
        "1.6.22-1",
        "1.6.23-1",
        "1.6.24-1build1",
        "1.6.24-1build3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "memcached",
            "binary_version": "1.6.38-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "memcached",
        "purl": "pkg:deb/ubuntu/memcached@1.6.38-1ubuntu0.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.38-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.37-1",
        "1.6.38-1",
        "1.6.38-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "memcached",
            "binary_version": "1.6.40-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "memcached",
        "purl": "pkg:deb/ubuntu/memcached@1.6.40-1ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.40-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.38-1build1",
        "1.6.39-2",
        "1.6.40-1"
      ]
    }
  ],
  "aliases": [],
  "details": "In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.",
  "id": "UBUNTU-CVE-2026-47784",
  "modified": "2026-05-27T13:58:03Z",
  "published": "2026-05-20T07:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-47784"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-47784"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/memcached/memcached/compare/1.6.41...1.6.42"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/memcached/memcached/wiki/ReleaseNotes1642"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8320-1"
    }
  ],
  "related": [
    "USN-8320-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-47784"
  ]
}

WID-SEC-W-2026-1615

Vulnerability from csaf_certbund - Published: 2026-05-20 22:00 - Updated: 2026-06-08 22:00

Summary

memcached: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungen

Severity

Hoch

Scope

2 vulnerabilities in this advisory, including CVE-2026-47784.

CVE-2026-47784

Known affected: 6 products

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-47784 (GCVE-0-2026-47784)

Vulnerability from bitnami_vulndb

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature