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Debian · Security advisory · May 15, 2026
Debian · Security advisory · May 15, 2026DEBIAN-CVE-2026-6766: Security update for 3 packages
DEBIAN-CVE-2026-6766, released May 15, 2026, fixes 1 CVE across 3 products. None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
1
None rated Critical
Exploited
0
None reported
Highest CVSS
8.8
Base score, 0 to 10
Highest EPSS
0.0026
17th percentile
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| firefox-esr | Debian 12.15 (bookworm) | 140.10.0esr-1~deb12u1 |
| firefox-esr | Debian 13.5 (trixie) | 140.10.0esr-1~deb13u1 |
| firefox-esr | Debian 14 | 140.10.0esr-1 |
| nss | Debian 12.15 (bookworm) | 2:3.87.1-1+deb12u3 |
| nss | Debian 13.5 (trixie) | 2:3.110-1+deb13u2 |
| nss | Debian 14 | 2:3.123-1 |
| thunderbird | Debian 12.15 (bookworm) | 1:140.10.0esr-1~deb12u1 |
| thunderbird | Debian 13.5 (trixie) | 1:140.10.0esr-1~deb13u1 |
| thunderbird | Debian 14 | 1:140.10.0esr-1 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2026-6766 | Incorrect boundary conditions in the Libraries component in NSS | 8.8 | 0.0026 | None reported |
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