Vulnerability-Lookup

OESA-2026-3770 (CVE-2026-78376)

Vulnerability from osv_openeuler – Published: 2026-09-14 16:34 – Updated: 2026-09-14 16:34 – Source website

Summary

webkitgtk security update

Details

WebKitGTK is the port of the WebKit web rendering engine to the GTK platform. This package contains WebKitGTK for GTK 3 and libsoup 3.

Security Fix(es):

A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption.(CVE-2026-78376)

A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling. The vulnerability exists in the findFeature function of OpenTypeVerticalData, which fails to properly validate the full featurelist array.(CVE-2026-83596)

Severity

8.8 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-78376	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-83596	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "jsc4.1-2.38.2-14.oe2403sp1.aarch64.rpm",
          "jsc4.1-devel-2.38.2-14.oe2403sp1.aarch64.rpm",
          "jsc5.0-2.38.2-14.oe2403sp1.aarch64.rpm",
          "jsc5.0-devel-2.38.2-14.oe2403sp1.aarch64.rpm",
          "webkit2gtk3-2.38.2-14.oe2403sp1.aarch64.rpm",
          "webkit2gtk3-debuginfo-2.38.2-14.oe2403sp1.aarch64.rpm",
          "webkit2gtk3-debugsource-2.38.2-14.oe2403sp1.aarch64.rpm",
          "webkit2gtk3-devel-2.38.2-14.oe2403sp1.aarch64.rpm",
          "webkit2gtk3-jsc-2.38.2-14.oe2403sp1.aarch64.rpm",
          "webkit2gtk3-jsc-devel-2.38.2-14.oe2403sp1.aarch64.rpm",
          "webkit2gtk4.1-2.38.2-14.oe2403sp1.aarch64.rpm",
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          "webkit2gtk5.0-2.38.2-14.oe2403sp1.aarch64.rpm",
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        ],
        "noarch": [
          "webkit2gtk3-help-2.38.2-14.oe2403sp1.noarch.rpm",
          "webkit2gtk4.1-help-2.38.2-14.oe2403sp1.noarch.rpm",
          "webkit2gtk5.0-help-2.38.2-14.oe2403sp1.noarch.rpm"
        ],
        "src": [
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        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "webkitgtk",
        "purl": "pkg:rpm/openEuler/webkitgtk\u0026distro=openEuler-24.03-LTS-SP1"
      },
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          "events": [
            {
              "introduced": "0"
            },
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              "fixed": "webkit2gtk5.0-2.38.2-14.oe2403sp1"
            }
          ],
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    "severity": "High"
  },
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  "id": "OESA-2026-3770",
  "modified": "2026-09-14T16:34:09Z",
  "published": "2026-09-14T16:34:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3770"
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78376"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83596"
    }
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  "schema_version": "1.7.2",
  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "webkitgtk security update",
  "upstream": [
    "CVE-2026-78376",
    "CVE-2026-83596"
  ]
}

CVE-2026-78376 (GCVE-0-2026-78376)

Vulnerability from cvelistv5 – Published: 2026-08-24 13:29 – Updated: 2026-08-25 13:46

Title

Webkitgtk: use-after-free of jscvalue function parameters

Summary

A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 2026-08-24 00:00 UTC

CWE

CWE-416 - Use After Free

Assigner

redhat redhat root

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-78376	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2521858	issue-trackingx_refsource_REDHAT
https://github.com/WebKit/WebKit/pull/72142

Impacted products

6 products

Vendor	Product	Version
WebKit	WebKit	Affected: 2.21.1 , < * (semver)
WebKitGTK	WebKitGTK	Affected: 2.21.1 , < * (semver)
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

2026-08-24 00:00

Credits

Red Hat would like to thank Igalia for reporting this issue.

Show details on NVD website

JSON

To clipboard

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CVE-2026-83596 (GCVE-0-2026-83596)

Vulnerability from cvelistv5 – Published: 2026-08-31 20:46 – Updated: 2026-09-04 19:55

Title

Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature

Summary

A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 2026-09-02 03:55 UTC

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

redhat redhat root

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-83596	vdb-entryx_refsource_REDHAT
https://bugs.webkit.org/show_bug.cgi?id=322969
https://bugzilla.redhat.com/show_bug.cgi?id=2526490	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
WebKit	WebKit	Affected: 1.10.0 , < * (semver)
WebKitGTK	WebKitGTK	Affected: 1.10.0 , < * (semver)
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

2026-08-31 00:00

Credits

Red Hat would like to thank Google Big Sleep for reporting this issue.

Show details on NVD website

JSON

To clipboard

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        },
        {
          "url": "https://bugs.webkit.org/show_bug.cgi?id=322969"
        },
        {
          "name": "RHBZ#2526490",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526490"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-31T19:57:48.998Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-08-31T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature",
      "workarounds": [
        {
          "lang": "en",
          "value": "Do not process or load untrusted web content with WebKitGTK.\n\nIn Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp.\n\nThis vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction.\n\nTo mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface.\n\nAdditionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-120: Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-83596",
    "datePublished": "2026-08-31T20:46:24.116Z",
    "dateReserved": "2026-08-31T20:32:52.926Z",
    "dateUpdated": "2026-09-04T19:55:20.221Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

OESA-2026-3770 (CVE-2026-78376)

CVE-2026-78376 (GCVE-0-2026-78376)

CVE-2026-83596 (GCVE-0-2026-83596)

Tags

Sightings

Nomenclature

Related by attack behaviour