Vulnerability-Lookup

CNVD-2026-31197

Vulnerability from cnvd - Published: 2026-08-07

Title

Mozilla Firefox ESR缓冲区溢出漏洞（CNVD-2026-31197）

Description

Mozilla Firefox ESR是Mozilla基金会开源的Firefox（Web浏览器）的一个延长支持版本。 Mozilla Firefox ESR存在缓冲区溢出漏洞。该漏洞源于内存安全错误，攻击者可利用该漏洞导致内存损坏，进而被利用执行任意代码。

Severity

高

Patch Name

Mozilla Firefox ESR缓冲区溢出漏洞（CNVD-2026-31197）的补丁

Patch Description

Mozilla Firefox ESR是Mozilla基金会开源的Firefox（Web浏览器）的一个延长支持版本。 Mozilla Firefox ESR存在缓冲区溢出漏洞。该漏洞源于内存安全错误，攻击者可利用该漏洞导致内存损坏，进而被利用执行任意代码。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://www.mozilla.org/security/advisories/mfsa2026-69/,https://www.mozilla.org/security/advisories/mfsa2026-70/

Reference

ttps://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518

Impacted products

Name
['Mozilla Firefox ESR <140.12', 'Mozilla Firefox ESR <115.37']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-16361",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-16361"
    }
  },
  "description": "Mozilla Firefox ESR\u662fMozilla\u57fa\u91d1\u4f1a\u5f00\u6e90\u7684Firefox\uff08Web\u6d4f\u89c8\u5668\uff09\u7684\u4e00\u4e2a\u5ef6\u957f\u652f\u6301\u7248\u672c\u3002\n\nMozilla Firefox ESR\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5185\u5b58\u5b89\u5168\u9519\u8bef\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u5185\u5b58\u635f\u574f\uff0c\u8fdb\u800c\u88ab\u5229\u7528\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://www.mozilla.org/security/advisories/mfsa2026-69/,https://www.mozilla.org/security/advisories/mfsa2026-70/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-31197",
  "openTime": "2026-08-07",
  "patchDescription": "Mozilla Firefox ESR\u662fMozilla\u57fa\u91d1\u4f1a\u5f00\u6e90\u7684Firefox\uff08Web\u6d4f\u89c8\u5668\uff09\u7684\u4e00\u4e2a\u5ef6\u957f\u652f\u6301\u7248\u672c\u3002\r\n\r\nMozilla Firefox ESR\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5185\u5b58\u5b89\u5168\u9519\u8bef\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u5185\u5b58\u635f\u574f\uff0c\u8fdb\u800c\u88ab\u5229\u7528\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Mozilla Firefox ESR\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2026-31197\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Mozilla Firefox ESR \u003c140.12",
      "Mozilla Firefox ESR \u003c115.37"
    ]
  },
  "referenceLink": "ttps://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518",
  "serverity": "\u9ad8",
  "submitTime": "2026-07-23",
  "title": "Mozilla Firefox ESR\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2026-31197\uff09"
}

CVE-2026-16361 (GCVE-0-2026-16361)

Vulnerability from cvelistv5 – Published: 2026-07-21 12:38 – Updated: 2026-07-24 03:55

Title

Memory safety bugs fixed in Thunderbird ESR 140.13

Summary

Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-23 00:00 UTC

CWE

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Assigner

mozilla

References

4 references

URL	Tags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2…
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: 115.38 , ≤ 115.* (rpm) Unaffected: 140.13 , ≤ * (rpm)
Mozilla	Thunderbird	Unaffected: 140.13 , ≤ * (rpm)

Credits

The Mozilla Fuzzing Team

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-2026-16361",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-23T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-119",
                "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-24T03:55:36.035Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "115.*",
              "status": "unaffected",
              "version": "115.38",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "140.13",
              "versionType": "rpm"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "140.13",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "The Mozilla Fuzzing Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13."
            }
          ],
          "value": "Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-22T19:19:43.379Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "name": "High-severity memory safety bugs fixed in Thunderbird ESR 140.13",
          "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-69/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-70/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-72/"
        }
      ],
      "title": "Memory safety bugs fixed in Thunderbird ESR 140.13"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-16361",
    "datePublished": "2026-07-21T12:38:27.370Z",
    "dateReserved": "2026-07-20T21:56:10.203Z",
    "dateUpdated": "2026-07-24T03:55:36.035Z",
    "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.

Action not permitted

CNVD-2026-31197

CVE-2026-16361 (GCVE-0-2026-16361)

Tags

Sightings

Nomenclature