Vulnerability details
CVE-2026-6766
Incorrect boundary conditions in the Libraries component in NSS
CVSS 3.1
7.5High
Official description
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
5
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Details
- Published
- 2026-04-21
- Last updated
- 2026-05-26
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.25%
Probability of exploitation in 30 days
17.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-754Improper Check for Unusual or Exceptional Conditions