CVE-2024-9394: An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the
Source GCVE Database
Not known to be exploited · CVSS 6.1 Medium.
Data as of 29 Oct 2026, 22:52 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 6.1 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 1 Oct 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
Description
An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://devtools` origin. This could allow them to access cross-origin JSON content. This access is limited to "same site" documents by the Site Isolation feature on desktop clients, but full cross-origin access is possible on Android versions. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.
References
- nvd.nist.gov/vuln/detail/CVE-2024-9394 (opens in a new tab)
- bugzilla.mozilla.org/show_bug.cgi?id=1918874 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2024/10/msg00004.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2024/10/msg00006.html (opens in a new tab)
- mozilla.org/security/advisories/mfsa2024-46 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2024-47 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2024-48 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2024-49 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2024-50 (opens in a new tab)