CNVD-2026-26109

Vulnerability from cnvd - Published: 2026-07-02
VLAI
Title
Mozilla Firefox ESR和Mozilla Thunderbird缓冲区溢出漏洞（CNVD-2026-26109）
Description
Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。 Mozilla Firefox ESR和Mozilla Thunderbird存在缓冲区溢出漏洞，攻击者可利用该漏洞导致拒绝服务。
Severity
中
Patch Name
Mozilla Firefox ESR和Mozilla Thunderbird缓冲区溢出漏洞（CNVD-2026-26109）的补丁
Patch Description
Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。 Mozilla Firefox ESR和Mozilla Thunderbird存在缓冲区溢出漏洞，攻击者可利用该漏洞导致拒绝服务。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

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载: https://www.mozilla.org/en-US/security/advisories/mfsa2026-58/

Reference
https://www.mozilla.org/en-US/security/advisories/mfsa2026-58/
Impacted products
Name
['Mozilla Firefox ESR <140.12', 'Mozilla Thunderbird <140.12']
Show details on source website
To clipboard 

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-12329",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-12329"
    }
  },
  "description": "Mozilla Firefox\u662f\u4e00\u6b3e\u5f00\u6e90Web\u6d4f\u89c8\u5668\u3002Mozilla Firefox ESR\u662fFirefox(Web\u6d4f\u89c8\u5668)\u7684\u4e00\u4e2a\u5ef6\u957f\u652f\u6301\u7248\u672c\u3002Mozilla Thunderbird\u662f\u4e00\u5957\u4eceMozilla Application Suite\u72ec\u7acb\u51fa\u6765\u7684\u7535\u5b50\u90ae\u4ef6\u5ba2\u6237\u7aef\u8f6f\u4ef6\u3002\n\nMozilla Firefox ESR\u548cMozilla Thunderbird\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d:\r\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2026-58/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-26109",
  "openTime": "2026-07-02",
  "patchDescription": "Mozilla Firefox\u662f\u4e00\u6b3e\u5f00\u6e90Web\u6d4f\u89c8\u5668\u3002Mozilla Firefox ESR\u662fFirefox(Web\u6d4f\u89c8\u5668)\u7684\u4e00\u4e2a\u5ef6\u957f\u652f\u6301\u7248\u672c\u3002Mozilla Thunderbird\u662f\u4e00\u5957\u4eceMozilla Application Suite\u72ec\u7acb\u51fa\u6765\u7684\u7535\u5b50\u90ae\u4ef6\u5ba2\u6237\u7aef\u8f6f\u4ef6\u3002\r\n\r\nMozilla Firefox ESR\u548cMozilla Thunderbird\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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\u548cMozilla Thunderbird\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2026-26109\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Mozilla Firefox ESR \u003c140.12",
      "Mozilla Thunderbird \u003c140.12"
    ]
  },
  "referenceLink": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-58/",
  "serverity": "\u4e2d",
  "submitTime": "2026-06-22",
  "title": "Mozilla Firefox ESR\u548cMozilla Thunderbird\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2026-26109\uff09"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.