Vulnerability-Lookup

CVE-2026-9080 (GCVE-0-2026-9080)

Vulnerability from cvelistv5 – Published: 2026-07-03 06:17 – Updated: 2026-09-15 06:03

Title

UAF after pause in socket callback

Summary

Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers a use-after-free vulnerability, where libcurl attempts to store a flag using a dangling struct pointer immediately after that pointer's memory has been freed.

Severity

7.3 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-06 16:54 UTC

CWE

CWE-416 - Use After Free

Assigner

curl redhat root

References

3 references

URL	Tags
https://curl.se/docs/CVE-2026-9080.json
https://curl.se/docs/CVE-2026-9080.html
https://hackerone.com/reports/3749204

Impacted products

3 products

Vendor	Product	Version	CPE status
curl	curl	Affected: 8.13.0 , < 8.14.2 (semver) Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.20.1 (semver)	guessed
curl	curl	Affected: cfc657a48dbafb4194676d4c9d841388b3a22210 , < 5ab34cba42e4ee4282fe8bab43f311d51b9bf9bd (git)	guessed
curl	curl	Affected: 8.20.0 Affected: 8.19.0 Affected: 8.18.0 Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0	guessed

Credits

Joshua Rogers (Aisle Research) Joshua Rogers (Aisle Research) Daniel Stenberg

Show details on NVD website

JSON

To clipboard

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                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-15T06:03:30.239Z",
            "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
            "shortName": "curl"
          },
          "references": [
            {
              "url": "https://curl.se/docs/CVE-2026-9080.json"
            },
            {
              "url": "https://curl.se/docs/CVE-2026-9080.html"
            },
            {
              "url": "https://hackerone.com/reports/3749204"
            }
          ],
          "title": "UAF after pause in socket callback",
          "x_generator": {
            "engine": "cvelib 1.8.0"
          },
          "x_osv": {
            "affected": [
              {
                "ranges": [
                  {
                    "events": [
                      {
                        "introduced": "8.13.0"
                      },
                      {
                        "fixed": "8.14.2"
                      },
                      {
                        "introduced": "8.15.0"
                      },
                      {
                        "fixed": "8.16.1"
                      },
                      {
                        "introduced": "8.17.0"
                      },
                      {
                        "fixed": "8.20.1"
                      }
                    ],
                    "type": "SEMVER"
                  },
                  {
                    "events": [
                      {
                        "introduced": "cfc657a48dbafb4194676d4c9d841388b3a22210"
                      },
                      {
                        "fixed": "5ab34cba42e4ee4282fe8bab43f311d51b9bf9bd"
                      }
                    ],
                    "repo": "https://github.com/curl/curl.git",
                    "type": "GIT"
                  }
                ],
                "versions": [
                  "8.20.0",
                  "8.19.0",
                  "8.18.0",
                  "8.17.0",
                  "8.16.0",
                  "8.15.0",
                  "8.14.1",
                  "8.14.0",
                  "8.13.0"
                ]
              }
            ],
            "aliases": [
              "CVE-2026-9080"
            ],
            "credits": [
              {
                "name": "Joshua Rogers (Aisle Research)",
                "type": "finder"
              },
              {
                "name": "Joshua Rogers (Aisle Research)",
                "type": "remediation developer"
              },
              {
                "name": "Daniel Stenberg",
                "type": "remediation developer"
              }
            ],
            "database_specific": {
              "CWE": {
                "desc": "Use After Free",
                "id": "CWE-416"
              },
              "URL": "https://curl.se/docs/CVE-2026-9080.json",
              "affects": "lib",
              "issue": "https://hackerone.com/reports/3749204",
              "last_affected": "8.20.0",
              "package": "curl",
              "severity": "Low",
              "www": "https://curl.se/docs/CVE-2026-9080.html"
            },
            "details": "Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION`\ncallback triggers a use-after-free vulnerability, where libcurl attempts to\nstore a flag using a dangling struct pointer immediately after that pointer\u0027s\nmemory has been freed.",
            "id": "CURL-CVE-2026-9080",
            "modified": "2026-09-07T10:34:51.00Z",
            "published": "2026-06-24T08:00:00.00Z",
            "schema_version": "1.5.0",
            "summary": "UAF after pause in socket callback"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "assignerShortName": "curl",
        "cveId": "CVE-2026-9080",
        "datePublished": "2026-07-03T06:17:34.905Z",
        "dateReserved": "2026-05-20T12:59:50.588Z",
        "dateUpdated": "2026-09-15T06:03:30.239Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

BELL-CVE-2026-9080 (CVE-2026-9080)

Vulnerability from osv_bellsoft – Published: 2026-07-02 17:40 – Updated: 2026-07-06 18:03 – Source website

Severity

7.3 (High)


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

References

URL

Type

https://docs.bell-sw.com/security/cves/CVE-2026-9080

ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Alpaquita:23",
        "name": "curl",
        "purl": "pkg:apk/alpaquita/curl?arch=source\u0026distro=23"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.1.0-r2"
            },
            {
              "fixed": "8.21.0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Alpaquita:25",
        "name": "curl",
        "purl": "pkg:apk/alpaquita/curl?arch=source\u0026distro=25"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.14.0-r1"
            },
            {
              "fixed": "8.21.0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Alpaquita:stream",
        "name": "curl",
        "purl": "pkg:apk/alpaquita/curl?arch=source\u0026distro=stream"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.1.2-r0"
            },
            {
              "fixed": "8.21.0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "BellSoft Hardened Containers:stream",
        "name": "curl",
        "purl": "pkg:apk/bellsoft-hardened-containers/curl?arch=source\u0026distro=stream"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.1.2-r0"
            },
            {
              "fixed": "8.21.0-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "id": "BELL-CVE-2026-9080",
  "modified": "2026-07-06T18:03:31.246461Z",
  "published": "2026-07-02T17:40:11.458939Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://docs.bell-sw.com/security/cves/CVE-2026-9080"
    }
  ],
  "schema_version": "1.7.4",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-9080"
  ]
}

CERTFR-2026-AVI-0797

Vulnerability from certfr_avis - Published: 2026-06-24 - Updated: 2026-06-24

De multiples vulnérabilités ont été découvertes dans cURL et libcurl. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Curl	cURL et libcurl	cURL et libcurl versions antérieures à 8.21.0

References

Title

Publication Time

FKIE_CVE-2026-9080

Vulnerability from fkie_nvd - Published: 2026-07-03 07:16 - Updated: 2026-09-15 07:16

Severity

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

Summary

References

URL	Tags
2499f714-1537-4658-8207-48ae4bb9eae9	https://curl.se/docs/CVE-2026-9080.html	Patch, Vendor Advisory
2499f714-1537-4658-8207-48ae4bb9eae9	https://curl.se/docs/CVE-2026-9080.json	Vendor Advisory
2499f714-1537-4658-8207-48ae4bb9eae9	https://hackerone.com/reports/3749204	Exploit, Issue Tracking, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://hackerone.com/reports/3749204	Exploit, Issue Tracking, Third Party Advisory

Impacted products

	Vendor	Product	Version
	haxx	curl	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThan": "8.14.2",
              "status": "affected",
              "version": "8.13.0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.16.1",
              "status": "affected",
              "version": "8.15.0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.20.1",
              "status": "affected",
              "version": "8.17.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "repo": "https://github.com/curl/curl.git",
          "vendor": "curl",
          "versions": [
            {
              "lessThan": "5ab34cba42e4ee4282fe8bab43f311d51b9bf9bd",
              "status": "affected",
              "version": "cfc657a48dbafb4194676d4c9d841388b3a22210",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "status": "affected",
              "version": "8.20.0"
            },
            {
              "status": "affected",
              "version": "8.19.0"
            },
            {
              "status": "affected",
              "version": "8.18.0"
            },
            {
              "status": "affected",
              "version": "8.17.0"
            },
            {
              "status": "affected",
              "version": "8.16.0"
            },
            {
              "status": "affected",
              "version": "8.15.0"
            },
            {
              "status": "affected",
              "version": "8.14.1"
            },
            {
              "status": "affected",
              "version": "8.14.0"
            },
            {
              "status": "affected",
              "version": "8.13.0"
            }
          ]
        }
      ],
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C87B09EB-4326-4209-9055-93BEE0676194",
              "versionEndExcluding": "8.21.0",
              "versionStartIncluding": "8.13.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION`\ncallback triggers a use-after-free vulnerability, where libcurl attempts to\nstore a flag using a dangling struct pointer immediately after that pointer\u0027s\nmemory has been freed."
    }
  ],
  "id": "CVE-2026-9080",
  "lastModified": "2026-09-15T07:16:34.767",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9080",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-06T16:54:41.919630Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-03T07:16:25.713",
  "references": [
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://curl.se/docs/CVE-2026-9080.html"
    },
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://curl.se/docs/CVE-2026-9080.json"
    },
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://hackerone.com/reports/3749204"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://hackerone.com/reports/3749204"
    }
  ],
  "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-HF34-V47H-W6M3

Vulnerability from github – Published: 2026-07-03 09:31 – Updated: 2026-07-06 18:30

Details

Calling curl_easy_pause() within the event-based CURLMOPT_SOCKETFUNCTION callback triggers a use-after-free vulnerability, where libcurl attempts to store a flag using a dangling struct pointer immediately after that pointer's memory has been freed.

Severity

7.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-9080"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-03T07:16:25Z",
    "severity": "HIGH"
  },
  "details": "Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION`\ncallback triggers a use-after-free vulnerability, where libcurl attempts to\nstore a flag using a dangling struct pointer immediately after that pointer\u0027s\nmemory has been freed.",
  "id": "GHSA-hf34-v47h-w6m3",
  "modified": "2026-07-06T18:30:49Z",
  "published": "2026-07-03T09:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9080"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3749204"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-9080.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-9080.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-9080

Vulnerability from csaf_microsoft - Published: 2026-07-02 00:00 - Updated: 2026-07-09 01:49

Summary

UAF after pause in socket callback

Scope

1 vulnerability in this advisory, including CVE-2026-9080.

CVE-2026-9080

Known not affected: 3 products

Open the full advisory

OPENSUSE-SU-2026:11230-1

Vulnerability from csaf_opensuse - Published: 2026-07-09 00:00 - Updated: 2026-09-17 17:13

Summary

curl-8.21.0-1.1 on GA media

Severity

Moderate

Scope

18 vulnerabilities in this advisory, including CVE-2026-9080.

CVE-2026-9080

5.9 (Medium)


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

Recommended: 36 products

Open the full advisory

OPENSUSE-SU-2026:21272-1

Vulnerability from csaf_opensuse - Published: 2026-07-08 13:46 - Updated: 2026-09-17 17:38

Summary

Security update for curl

Severity

Important

Scope

10 vulnerabilities in this advisory, including CVE-2026-9080.

CVE-2026-9080

5.9 (Medium)


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

Recommended: 15 products

Open the full advisory

RHSA-2026:29017

Vulnerability from csaf_redhat - Published: 2026-06-24 12:18 - Updated: 2026-09-18 17:44

Summary

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

Severity

Important

Scope

16 vulnerabilities in this advisory, including CVE-2026-9080.

CVE-2026-9080

A flaw was found in libcurl. When `curl_easy_pause()` is called within the event-based `CURLMOPT_SOCKETFUNCTION` callback, a use-after-free vulnerability is triggered. This occurs because libcurl attempts to store a flag using a pointer to memory that has already been freed. An attacker could potentially exploit this to cause a denial of service or execute arbitrary code.

7.3 (High)


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

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:29017

Open the full advisory

RHSA-2026:34975

Vulnerability from csaf_redhat - Published: 2026-07-02 15:43 - Updated: 2026-09-18 17:44

Summary

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

Severity

Critical

Scope

24 vulnerabilities in this advisory, including CVE-2026-9080.

CVE-2026-9080

7.3 (High)


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

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:34975

Open the full advisory

SUSE-SU-2026:22553-1

Vulnerability from csaf_suse - Published: 2026-07-08 13:46 - Updated: 2026-09-16 20:02

Summary

Security update for curl

Severity

Important

Scope

10 vulnerabilities in this advisory, including CVE-2026-9080.

CVE-2026-9080

5.9 (Medium)


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

Recommended: 8 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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-9080 (GCVE-0-2026-9080)

BELL-CVE-2026-9080 (CVE-2026-9080)

Solutions

Tags

Sightings

Nomenclature

Related by attack behaviour