Vulnerability-Lookup

CVE-2026-85197 (GCVE-0-2026-85197)

Vulnerability from cvelistv5 – Published: 2026-09-04 07:34 – Updated: 2026-09-16 17:20

Title

Libsoup: libsoup: heap use-after-free in libsoup http/2 client on_data_read() via goaway during body upload

Summary

A flaw was found in libsoup. A malicious HTTP/2 server or a Man-in-the-Middle (MITM) attacker can exploit a heap use-after-free vulnerability in the HTTP/2 client implementation. This occurs when a GNOME application uploads a file using HTTP/2, and the server sends a GOAWAY frame while the file body is being read asynchronously. This can lead to memory corruption, potentially resulting in information disclosure or arbitrary code execution.

Severity

7.6 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-04 18:15 UTC

CWE

CWE-416 - Use After Free

Assigner

redhat redhat root

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:68235	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-85197	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2528425	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:3.6.5-3.el10_2.14 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-09-03 13:00

Credits

Red Hat would like to thank Naresh Kandula (Nottiboy_1337) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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ALSA-2026:68235

Vulnerability from osv_almalinux – Published: 2026-09-16 00:00 – Updated: 2026-09-17 09:32 – Source website

Summary

Important: libsoup3 security update

Details

Libsoup is an HTTP library implementation in C. It was originally part of a SOAP (Simple Object Access Protocol) implementation called Soup, but the SOAP and non-SOAP parts have now been split into separate packages. libsoup uses the Glib main loop and is designed to work well with GTK applications. This enables GNOME applications to access HTTP servers on the network in a completely asynchronous fashion, very similar to the Gtk+ programming model (a synchronous operation mode is also supported for those who want it), but the SOAP parts were removed long ago.

Security Fix(es):

SoupWebsocketExtensionDeflate: libsoup: libsoup: WebSocket permessage-deflate Unbounded Decompression Remote Denial of Service (CVE-2026-15709)
libsoup: SoupWebsocketConnection: libsoup: WebSocket remote denial of service via oversized control frame protocol violation (CVE-2026-15711)
libsoup: libsoup: Heap use-after-free in libsoup HTTP/2 client on_data_read() via GOAWAY during body upload (CVE-2026-85197)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:68235	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-15709	REPORT
	https://access.redhat.com/security/cve/CVE-2026-15711	REPORT
	https://access.redhat.com/security/cve/CVE-2026-85197	REPORT
	https://bugzilla.redhat.com/2499922	REPORT
	https://bugzilla.redhat.com/2499924	REPORT
	https://bugzilla.redhat.com/2528425	REPORT
	https://errata.almalinux.org/10/ALSA-2026-68235.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libsoup3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.5-3.el10_2.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libsoup3-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.5-3.el10_2.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libsoup3-doc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.5-3.el10_2.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Libsoup is an HTTP library implementation in C. It was originally part of a SOAP (Simple Object Access Protocol) implementation called Soup, but the SOAP and non-SOAP parts have now been split into separate packages. libsoup uses the Glib main loop and is designed to work well with GTK applications. This enables GNOME applications to access HTTP servers on the network in a completely asynchronous fashion, very similar to the Gtk+ programming model (a synchronous operation mode is also supported for those who want it), but the SOAP parts were removed long ago.  \n\nSecurity Fix(es):  \n\n  * SoupWebsocketExtensionDeflate: libsoup: libsoup: WebSocket permessage-deflate Unbounded Decompression Remote Denial of Service (CVE-2026-15709)\n  * libsoup: SoupWebsocketConnection: libsoup: WebSocket remote denial of service via oversized control frame protocol violation (CVE-2026-15711)\n  * libsoup: libsoup: Heap use-after-free in libsoup HTTP/2 client on_data_read() via GOAWAY during body upload (CVE-2026-85197)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:68235",
  "modified": "2026-09-17T09:32:00Z",
  "published": "2026-09-16T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:68235"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-15709"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-15711"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-85197"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2499922"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2499924"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2528425"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-68235.html"
    }
  ],
  "related": [
    "CVE-2026-15709",
    "CVE-2026-15711",
    "CVE-2026-85197"
  ],
  "summary": "Important: libsoup3 security update"
}

FKIE_CVE-2026-85197

Vulnerability from fkie_nvd - Published: 2026-09-04 08:17 - Updated: 2026-09-16 18:17

Severity

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

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:68235
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-85197
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2528425
	secalert@redhat.com	https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10.2"
          ],
          "defaultStatus": "affected",
          "packageName": "libsoup3",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:3.6.5-3.el10_2.14",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unaffected",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "unaffected",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "unaffected",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "libsoup",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libsoup. A malicious HTTP/2 server or a Man-in-the-Middle (MITM) attacker can exploit a heap use-after-free vulnerability in the HTTP/2 client implementation. This occurs when a GNOME application uploads a file using HTTP/2, and the server sends a GOAWAY frame while the file body is being read asynchronously. This can lead to memory corruption, potentially resulting in information disclosure or arbitrary code execution."
    }
  ],
  "id": "CVE-2026-85197",
  "lastModified": "2026-09-16T18:17:17.720",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.7,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-85197",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-04T18:15:03.474491Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-04T08:17:16.677",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:68235"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-85197"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528425"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-PQ26-X6QP-8QR7

Vulnerability from github – Published: 2026-09-04 09:31 – Updated: 2026-09-16 18:31

Details

Severity

7.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-85197"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T08:17:16Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in libsoup. A malicious HTTP/2 server or a Man-in-the-Middle (MITM) attacker can exploit a heap use-after-free vulnerability in the HTTP/2 client implementation. This occurs when a GNOME application uploads a file using HTTP/2, and the server sends a GOAWAY frame while the file body is being read asynchronously. This can lead to memory corruption, potentially resulting in information disclosure or arbitrary code execution.",
  "id": "GHSA-pq26-x6qp-8qr7",
  "modified": "2026-09-16T18:31:20Z",
  "published": "2026-09-04T09:31:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85197"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:68235"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-85197"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528425"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-85197

Vulnerability from csaf_microsoft - Published: 2026-09-09 01:02 - Updated: 2026-09-24 02:28

Summary

Libsoup: libsoup: heap use-after-free in libsoup http/2 client on_data_read() via goaway during body upload

Scope

1 vulnerability in this advisory, including CVE-2026-85197.

CVE-2026-85197

7.6 (High)


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

Fixed: 2 products Known affected: 2 products

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

Open the full advisory

OPENSUSE-SU-2026:11823-1

Vulnerability from csaf_opensuse - Published: 2026-09-19 00:00 - Updated: 2026-09-20 21:49

Summary

libsoup-3_0-0-3.6.6-9.1 on GA media

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2026-85197.

CVE-2026-85197

7.5 (High)


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

Recommended: 28 products

Open the full advisory

OPENSUSE-SU-2026:21901-1

Vulnerability from csaf_opensuse - Published: 2026-09-21 12:40 - Updated: 2026-09-24 17:48

Summary

Security update for libsoup

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2026-85197.

CVE-2026-85197

7.5 (High)


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

Recommended: 13 products

Open the full advisory

RHSA-2026:68235

Vulnerability from csaf_opensuse - Published: 2026-09-16 17:18 - Updated: 2026-09-24 09:37

Summary

Red Hat Security Advisory: libsoup3 security update

Severity

Important

Scope

3 vulnerabilities in this advisory, including CVE-2026-85197.

CVE-2026-85197

7.6 (High)


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

Fixed: 18 products

https://access.redhat.com/errata/RHSA-2026:68235

Open the full advisory

SUSE-SU-2026:23848-1

Vulnerability from csaf_suse - Published: 2026-09-21 12:40 - Updated: 2026-09-23 08:31

Summary

Security update for libsoup

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2026-85197.

CVE-2026-85197

7.5 (High)


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

Recommended: 4 products

Open the full advisory

SUSE-SU-2026:23857-1

Vulnerability from csaf_suse - Published: 2026-09-21 12:40 - Updated: 2026-09-27 11:06

Summary

Security update for libsoup

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2026-85197.

CVE-2026-85197

7.5 (High)


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

Recommended: 26 products

Open the full advisory

SUSE-SU-2026:23866-1

Vulnerability from csaf_suse - Published: 2026-09-21 12:40 - Updated: 2026-09-27 11:06

Summary

Security update for libsoup

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2026-85197.

CVE-2026-85197

7.5 (High)


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

Recommended: 26 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.

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-2026-85197 (GCVE-0-2026-85197)

Tags

Sightings

Nomenclature

Related by attack behaviour