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CVE-2026-92240 (GCVE-0-2026-92240)

Vulnerability from cvelistv5 – Published: 2026-09-15 19:42 – Updated: 2026-09-15 20:01
VLAI
Title
Out-of-bounds read in IMAP response parser
Summary
A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged '* ID' response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156 and Thunderbird 140.16.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Mozilla Thunderbird Unaffected: 140.16 , ≤ 140.* (rpm)
Unaffected: 156 , ≤ * (rpm)
guessed Create a notification for this product.
Credits
Ahmed Albalawi
Show details on NVD website
To clipboard 

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  "containers": {
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      "affected": [
        {
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          "vendor": "Mozilla",
          "versions": [
            {
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              "status": "unaffected",
              "version": "140.16",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "156",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Ahmed Albalawi"
        }
      ],
      "descriptions": [
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          "supportingMedia": [
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              "value": "A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged \u0027* ID\u0027 response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156 and Thunderbird 140.16."
            }
          ],
          "value": "A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged \u0027* ID\u0027 response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156 and Thunderbird 140.16."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-15T20:01:42.207Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2069113"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-95/"
        }
      ],
      "title": "Out-of-bounds read in IMAP response parser"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-92240",
    "datePublished": "2026-09-15T19:42:53.494Z",
    "dateReserved": "2026-09-15T19:42:52.961Z",
    "dateUpdated": "2026-09-15T20:01:42.207Z",
    "state": "PUBLISHED"
  },
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  }
}



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  • 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.
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  • 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.


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