Vulnerability-Lookup

alsa-2026:20566

Vulnerability from osv_almalinux

Published

2026-05-26 00:00

Modified

2026-05-27 11:27

Summary

Important: firefox security update

Details

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

firefox: Other issue in the WebRTC component (CVE-2026-8094)
firefox: Memory safety bugs fixed in Firefox ESR 115.35.2, Firefox ESR 140.10.2 and Firefox 150.0.2 (CVE-2026-8092)
firefox: Use-after-free in the DOM: Networking component (CVE-2026-8090)

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-2026:20566	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-8090	REPORT
	https://access.redhat.com/security/cve/CVE-2026-8092	REPORT
	https://access.redhat.com/security/cve/CVE-2026-8094	REPORT
	https://bugzilla.redhat.com/2467706	REPORT
	https://bugzilla.redhat.com/2467708	REPORT
	https://bugzilla.redhat.com/2467709	REPORT
	https://errata.almalinux.org/8/ALSA-2026-20566.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "firefox"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "140.10.2-1.el8_10.alma.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.  \n\nSecurity Fix(es):  \n\n  * firefox: Other issue in the WebRTC component (CVE-2026-8094)\n  * firefox: Memory safety bugs fixed in Firefox ESR 115.35.2, Firefox ESR 140.10.2 and Firefox 150.0.2 (CVE-2026-8092)\n  * firefox: Use-after-free in the DOM: Networking component (CVE-2026-8090)\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-2026:20566",
  "modified": "2026-05-27T11:27:16Z",
  "published": "2026-05-26T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:20566"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-8090"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-8092"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-8094"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2467706"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2467708"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2467709"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/8/ALSA-2026-20566.html"
    }
  ],
  "related": [
    "CVE-2026-8094",
    "CVE-2026-8092",
    "CVE-2026-8090"
  ],
  "summary": "Important: firefox security update"
}

CVE-2026-8090 (GCVE-0-2026-8090)

Vulnerability from cvelistv5 – Published: 2026-05-07 12:45 – Updated: 2026-05-08 12:19

Title

Use-after-free in the DOM: Networking component

Summary

Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.

Severity

7.3 (High)


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

CWE

CWE-416 - Use After Free

Assigner

mozilla

References

6 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2034352
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

2 products

Vendor	Product	Version
Mozilla	Firefox	Unaffected: 115.35.2 , ≤ 115.* (rpm) Unaffected: 140.10.2 , ≤ 140.* (rpm) Unaffected: 150.0.2 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.10.2 , ≤ 140.* (rpm) Unaffected: 150.0.2 , ≤ * (rpm)

Credits

Kevin Brosnan

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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",
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            }
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            "other": {
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                "id": "CVE-2026-8090",
                "options": [
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        ],
        "problemTypes": [
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              {
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              }
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-07T13:49:45.916Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "product": "Firefox",
          "vendor": "Mozilla",
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            {
              "lessThanOrEqual": "115.*",
              "status": "unaffected",
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              "versionType": "rpm"
            },
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              "version": "140.10.2",
              "versionType": "rpm"
            },
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              "status": "unaffected",
              "version": "150.0.2",
              "versionType": "rpm"
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        },
        {
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          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "140.*",
              "status": "unaffected",
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              "versionType": "rpm"
            },
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              "version": "150.0.2",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Kevin Brosnan"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2."
            }
          ],
          "value": "Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T12:19:00.246Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2034352"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-40/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-41/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-42/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-43/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-44/"
        }
      ],
      "title": "Use-after-free in the DOM: Networking component"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-8090",
    "datePublished": "2026-05-07T12:45:04.609Z",
    "dateReserved": "2026-05-07T12:45:04.220Z",
    "dateUpdated": "2026-05-08T12:19:00.246Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-8092 (GCVE-0-2026-8092)

Vulnerability from cvelistv5 – Published: 2026-05-07 12:45 – Updated: 2026-05-19 16:48

Title

Memory safety bugs fixed in Firefox ESR 115.35.2, Firefox ESR 140.10.2 and Firefox 150.0.2

Summary

Memory safety bugs present in Firefox ESR 115.35.1, Firefox ESR 140.10.1 and Firefox 150.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.

Severity

8.1 (High)


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

CWE

CWE-125 - Out-of-bounds Read
CWE-787 - Out-of-bounds Write
CWE-416 - Use After Free

Assigner

mozilla

References

6 references

URL	Tags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

2 products

Vendor	Product	Version
Mozilla	Firefox	Unaffected: 115.35.2 , ≤ 115.* (rpm) Unaffected: 140.10.2 , ≤ 140.* (rpm) Unaffected: 150.0.2 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.10.2 , ≤ 140.* (rpm) Unaffected: 150.0.2 , ≤ * (rpm)

Credits

Andrew McCreight, Christian Holler, Lee Salzman, Maurice Dauer, Tom Schuster, Wayne Mery and the Mozilla Fuzzing Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-8092",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-08T03:55:45.627080Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-19T16:48:31.003Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "115.*",
              "status": "unaffected",
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              "versionType": "rpm"
            },
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              "status": "unaffected",
              "version": "140.10.2",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150.0.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.10.2",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "150.0.2",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Andrew McCreight, Christian Holler, Lee Salzman, Maurice Dauer, Tom Schuster, Wayne Mery and the Mozilla Fuzzing Team"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Memory safety bugs present in Firefox ESR 115.35.1, Firefox ESR 140.10.1 and Firefox 150.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2."
            }
          ],
          "value": "Memory safety bugs present in Firefox ESR 115.35.1, Firefox ESR 140.10.1 and Firefox 150.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-18T07:32:30.167Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "name": "Memory safety bugs fixed in Firefox ESR 115.35.2, Firefox ESR 140.10.2 and Firefox 150.0.2",
          "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1806249%2C2021977%2C2022576%2C2022722%2C2024439%2C2027883%2C2029463%2C2030323%2C2032042%2C2032043%2C2033270%2C2033637%2C2034422%2C2034496%2C2035879%2C2036516"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-40/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-41/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-42/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-43/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-44/"
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      ],
      "title": "Memory safety bugs fixed in Firefox ESR 115.35.2, Firefox ESR 140.10.2 and Firefox 150.0.2"
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    "datePublished": "2026-05-07T12:45:06.716Z",
    "dateReserved": "2026-05-07T12:45:06.414Z",
    "dateUpdated": "2026-05-19T16:48:31.003Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-8094 (GCVE-0-2026-8094)

Vulnerability from cvelistv5 – Published: 2026-05-07 12:45 – Updated: 2026-05-19 16:48

Title

Other issue in the WebRTC component

Summary

Other issue in the WebRTC component. This vulnerability was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2.

Severity

9.8 (Critical)


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

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

mozilla

References

3 references

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2035939
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…

Impacted products

2 products

Vendor	Product	Version
Mozilla	Firefox	Unaffected: 140.10.2 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.10.2 , ≤ * (rpm)

Credits

Michael Froman

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-8094",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "yes"
                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-08T22:35:19.242615Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-19T16:48:52.171Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "140.10.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "140.10.2",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Michael Froman"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Other issue in the WebRTC component. This vulnerability was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2."
            }
          ],
          "value": "Other issue in the WebRTC component. This vulnerability was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T12:19:01.354Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2035939"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-41/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-44/"
        }
      ],
      "title": "Other issue in the WebRTC component"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
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    "datePublished": "2026-05-07T12:45:08.185Z",
    "dateReserved": "2026-05-07T12:45:07.849Z",
    "dateUpdated": "2026-05-19T16:48:52.171Z",
    "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.

Action not permitted

alsa-2026:20566

Vulnerability from osv_almalinux

CVE-2026-8090 (GCVE-0-2026-8090)

CVE-2026-8092 (GCVE-0-2026-8092)

CVE-2026-8094 (GCVE-0-2026-8094)

Tags

Sightings

Nomenclature