CVE-2026-100817 json
Other issue in the JavaScript: WebAssembly component
published last mo. modified last mo. also EUVD-2026-88796
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Patch / fix
- mozilla thunderbird 157
- mozilla thunderbird_esr 157
- mozilla firefox 157
- mozilla firefox_esr 157
- MozillaFirefox openSUSE Tumbleweed 157.0.1-1.1
opensuse advisories openSUSE-SU-2026:12097-1
Is CVE-2026-100817 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Affected products
- Mozilla Thunderbird
- Mozilla Firefox
References
-
mozilla.org
/security/advisories/mfsa2026-101/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-97/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=2068670
permissions-required
Sources
- CVE List CVE-2026-100817
- NVD CVE-2026-100817
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.