CVE-2026-16354: Vulnerability in Mozilla Firefox
CVE-2026-16354 is an information disclosure vulnerability in the Graphics: ImageLib component of Mozilla Firefox. This flaw allows unauthorized disclosure of information without impacting integrity or availability. The vulnerability has been fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. It carries a high severity rating with a CVSS score of 7.5. No known exploits in the wild have been reported. Users should update to the fixed versions to mitigate this issue.
AI Analysis
Technical Summary
CVE-2026-16354 is an information disclosure vulnerability affecting the Graphics: ImageLib component in Mozilla Firefox and Thunderbird. The vulnerability allows an attacker to gain access to sensitive information, classified under CWE-200. It was addressed and fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The CVSS v3.1 base score is 7.5, indicating a high impact on confidentiality with no impact on integrity or availability. No public exploits are known, and the vendor has released official fixes as documented in multiple Mozilla security advisories.
Potential Impact
The vulnerability allows unauthorized information disclosure from the Graphics: ImageLib component, potentially exposing sensitive data to remote attackers without requiring user interaction or privileges. The impact is limited to confidentiality (high impact), with no effect on integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available and has been officially released by Mozilla. Users and administrators should update affected products to Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, or Thunderbird 140.13 or later versions. Applying these updates will remediate the vulnerability. No additional mitigation steps are indicated by the vendor.
CVE-2026-16354: Vulnerability in Mozilla Firefox
Description
CVE-2026-16354 is an information disclosure vulnerability in the Graphics: ImageLib component of Mozilla Firefox. This flaw allows unauthorized disclosure of information without impacting integrity or availability. The vulnerability has been fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. It carries a high severity rating with a CVSS score of 7.5. No known exploits in the wild have been reported. Users should update to the fixed versions to mitigate this issue.
CVSS v3.1
Score 7.5high
Affected software
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16354 is an information disclosure vulnerability affecting the Graphics: ImageLib component in Mozilla Firefox and Thunderbird. The vulnerability allows an attacker to gain access to sensitive information, classified under CWE-200. It was addressed and fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The CVSS v3.1 base score is 7.5, indicating a high impact on confidentiality with no impact on integrity or availability. No public exploits are known, and the vendor has released official fixes as documented in multiple Mozilla security advisories.
Potential Impact
The vulnerability allows unauthorized information disclosure from the Graphics: ImageLib component, potentially exposing sensitive data to remote attackers without requiring user interaction or privileges. The impact is limited to confidentiality (high impact), with no effect on integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available and has been officially released by Mozilla. Users and administrators should update affected products to Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, or Thunderbird 140.13 or later versions. Applying these updates will remediate the vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:55:56.965Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-69/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/","vendor":"Mozilla"}]
Threat ID: 6a5f6cb92a4a8d5989262420
Added to database: 07/21/2026, 12:57:29 UTC
Last enriched: 07/30/2026, 11:22:26 UTC
Last updated: 09/04/2026, 10:52:07 UTC
Views: 61
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