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CVE-2026-100771
Undefined behavior in the DOM: Streams component
High8.1EPSS 0.31%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
Undefined behavior in the DOM: Streams component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Timeline
ID reserved
By mozilla
- 3 days later
· 3 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.31% · top 76% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
Affected products
- unaffected 115.42 – ≤ 115.*
- unaffected 140.17 – ≤ 140.*
- unaffected 153.4 – ≤ 153.*
- unaffected 157 – ≤ *
- unaffected 140.17 – ≤ 140.*
- unaffected 153.4 – ≤ 153.*
- unaffected 157 – ≤ *
References (8)
- https://bugzilla.mozilla.org/show_bug.cgi?id=2068336 (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-100/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-101/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-102/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-103/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-97/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-98/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2026-99/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-100771)Record last updated .