CVE-2020-26958
Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Firefox no bloqueó una ejecución de scripts con tipos MIME incorrectos cuando la respuesta fue interceptada y almacenada en caché por medio de un ServiceWorker. Esto podría conllevar a una vulnerabilidad de inclusión de cross-site script, o una omisión de Content Security Policy. Esta vulnerabilidad afecta a Firefox versiones anteriores a 83, Firefox ESR versiones anteriores a 78.5, y Thunderbird versiones anteriores a 78.5
CVSS Scores
SSVC
- Decision:-
Timeline
- 2020-10-12 CVE Reserved
- 2020-11-28 CVE Published
- 2024-08-04 CVE Updated
- 2024-10-13 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
References (5)
URL | Tag | Source |
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URL | Date | SRC |
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URL | Date | SRC |
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URL | Date | SRC |
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https://www.mozilla.org/security/advisories/mfsa2020-50 | 2020-12-10 | |
https://www.mozilla.org/security/advisories/mfsa2020-51 | 2020-12-10 | |
https://www.mozilla.org/security/advisories/mfsa2020-52 | 2020-12-10 | |
https://access.redhat.com/security/cve/CVE-2020-26958 | 2020-12-01 | |
https://bugzilla.redhat.com/show_bug.cgi?id=1898735 | 2020-12-01 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | < 83.0 Search vendor "Mozilla" for product "Firefox" and version " < 83.0" | - |
Affected
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Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 78.5 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.5" | - |
Affected
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Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 78.5 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.5" | - |
Affected
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