CVE-2026-74945: Vulnerability in Mozilla Firefox
CVE-2026-74945 is an information disclosure vulnerability in the Graphics: Text component of Mozilla Firefox. This flaw allows unauthorized disclosure of information and was addressed in Firefox 154 and corresponding ESR and Thunderbird versions. The vulnerability has a CVSS score of 6.5, indicating a medium severity level. Multiple related security issues were fixed in Firefox 154 and ESR releases 115.39, 140.14, and 153.1. No known exploits in the wild have been reported for this vulnerability.
AI Analysis
Technical Summary
CVE-2026-74945 is an information disclosure vulnerability affecting the Graphics: Text component in Mozilla Firefox. It was fixed in Firefox 154, Firefox ESR 115.39, 140.14, and 153.1, as well as Thunderbird versions 154, 140.14, and 153.1. The vulnerability allows unauthorized information disclosure but does not impact integrity or availability. The CVSS v3.1 base score is 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). The vendor advisory confirms the fix and lists this vulnerability among multiple high-impact security issues resolved in these versions.
Potential Impact
The vulnerability allows an attacker to disclose sensitive information through the Graphics: Text component, potentially compromising user privacy or security. The CVSS score of 6.5 reflects a medium severity with high confidentiality impact but no integrity or availability impact. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A fix is available and has been released in Firefox 154, Firefox ESR 115.39, 140.14, 153.1, and corresponding Thunderbird versions. Users and administrators should update to these fixed versions to remediate this vulnerability. No additional mitigation actions are required beyond applying the official updates.
CVE-2026-74945: Vulnerability in Mozilla Firefox
Description
CVE-2026-74945 is an information disclosure vulnerability in the Graphics: Text component of Mozilla Firefox. This flaw allows unauthorized disclosure of information and was addressed in Firefox 154 and corresponding ESR and Thunderbird versions. The vulnerability has a CVSS score of 6.5, indicating a medium severity level. Multiple related security issues were fixed in Firefox 154 and ESR releases 115.39, 140.14, and 153.1. No known exploits in the wild have been reported for this vulnerability.
CVSS v3.1
Score 6.5medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74945 is an information disclosure vulnerability affecting the Graphics: Text component in Mozilla Firefox. It was fixed in Firefox 154, Firefox ESR 115.39, 140.14, and 153.1, as well as Thunderbird versions 154, 140.14, and 153.1. The vulnerability allows unauthorized information disclosure but does not impact integrity or availability. The CVSS v3.1 base score is 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). The vendor advisory confirms the fix and lists this vulnerability among multiple high-impact security issues resolved in these versions.
Potential Impact
The vulnerability allows an attacker to disclose sensitive information through the Graphics: Text component, potentially compromising user privacy or security. The CVSS score of 6.5 reflects a medium severity with high confidentiality impact but no integrity or availability impact. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A fix is available and has been released in Firefox 154, Firefox ESR 115.39, 140.14, 153.1, and corresponding Thunderbird versions. Users and administrators should update to these fixed versions to remediate this vulnerability. No additional mitigation actions are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:57:49.125Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-75/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-76/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a845504c6e8be03323673bd
Added to database: 08/18/2026, 12:50:12 UTC
Last enriched: 09/11/2026, 22:03:18 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 44
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