VDB
CVE-2026-6772
CVE-2026-6772
PUBLISHED
CVSS 7.5 HIGH
Incorrect boundary conditions in the Libraries component in NSS
Reported by mozilla · Published April 21, 2026
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| firefox-debugsource | errata.rockylinux.org | 140.10.0-1.el9, 140.10.0-1.el8, 140.10.0-1.el10, 0:140.10.0-1.el9_7.x86_64, 0:140.10.0-1.el9_7.s390x, 0:140.10.0-1.el9_7.ppc64le, 0:140.10.0-1.el9_7.aarch64, 0:140.10.0-1.el8_10.x86_64, 0:140.10.0-1.el8_10.aarch64, 0:140.10.0-1.el10_1.x86_64, 0:140.10.0-1.el10_1.s390x, 0:140.10.0-1.el10_1.ppc64le, 0:140.10.0-1.el10_1.aarch64 |
| firefox-x11 | errata.rockylinux.org | 140.10.0-1.el9, 0:140.10.0-1.el9_7.x86_64, 0:140.10.0-1.el9_7.s390x, 0:140.10.0-1.el9_7.ppc64le, 0:140.10.0-1.el9_7.aarch64 |
| firefox | errata.rockylinux.org | 140.10.0-1.el9, 140.10.0-1.el8, 140.10.0-1.el10, 0:140.10.0-1.el9_7.x86_64, 0:140.10.0-1.el9_7.src, 0:140.10.0-1.el9_7.s390x, 0:140.10.0-1.el9_7.ppc64le, 0:140.10.0-1.el9_7.aarch64, 0:140.10.0-1.el8_10.x86_64, 0:140.10.0-1.el8_10.src, 0:140.10.0-1.el8_10.aarch64, 0:140.10.0-1.el10_1.x86_64, 0:140.10.0-1.el10_1.src, 0:140.10.0-1.el10_1.s390x, 0:140.10.0-1.el10_1.ppc64le, 0:140.10.0-1.el10_1.aarch64 |
| thunderbird | errata.rockylinux.org | 140.10.1-1.el9, 140.10.0-1.el9, 140.10.0-1.el8, 140.10.0-1.el10, 0:140.10.0-1.el8_10.x86_64, 0:140.10.0-1.el8_10.src, 0:140.10.0-1.el8_10.aarch64, 0:140.10.0-1.el10_1.x86_64, 0:140.10.0-1.el10_1.src, 0:140.10.0-1.el10_1.s390x, 0:140.10.0-1.el10_1.ppc64le, 0:140.10.0-1.el10_1.aarch64 |
| nss-pkcs11-devel | Amazon Linux | 3.90.0-7.amzn2023.0.1, 3.90.0-2.amzn2.0.3 |
| thunderbird-debuginfo | errata.rockylinux.org | 140.10.1-1.el9, 140.10.0-1.el9, 140.10.0-1.el8, 140.10.0-1.el10, 0:140.10.0-1.el8_10.x86_64, 0:140.10.0-1.el8_10.aarch64, 0:140.10.0-1.el10_1.x86_64, 0:140.10.0-1.el10_1.s390x, 0:140.10.0-1.el10_1.ppc64le, 0:140.10.0-1.el10_1.aarch64 |
| firefox-debuginfo | errata.rockylinux.org | 140.10.0-1.el9, 140.10.0-1.el8, 140.10.0-1.el10, 0:140.10.0-1.el9_7.x86_64, 0:140.10.0-1.el9_7.s390x, 0:140.10.0-1.el9_7.ppc64le, 0:140.10.0-1.el9_7.aarch64, 0:140.10.0-1.el8_10.x86_64, 0:140.10.0-1.el8_10.aarch64, 0:140.10.0-1.el10_1.x86_64, 0:140.10.0-1.el10_1.s390x, 0:140.10.0-1.el10_1.ppc64le, 0:140.10.0-1.el10_1.aarch64 |
| thunderbird-debugsource | errata.rockylinux.org | 140.10.1-1.el9, 140.10.0-1.el9, 140.10.0-1.el8, 140.10.0-1.el10, 0:140.10.0-1.el8_10.x86_64, 0:140.10.0-1.el8_10.aarch64, 0:140.10.0-1.el10_1.x86_64, 0:140.10.0-1.el10_1.s390x, 0:140.10.0-1.el10_1.ppc64le, 0:140.10.0-1.el10_1.aarch64 |
| nss-softokn | Amazon Linux | 3.90.0-7.amzn2023.0.1 |
| nss-devel | Amazon Linux | 3.90.0-7.amzn2023.0.1, 3.90.0-2.amzn2.0.3 |
| nss-softokn-freebl | Amazon Linux | 3.90.0-7.amzn2023.0.1 |
| nspr-devel | Amazon Linux | 4.35.0-7.amzn2023.0.1 |
15 more packages have a fixed version. See every fix in Lookup.
Risk scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 115.35, 140.10, 150 |
| Mozilla | Thunderbird | 140.10, 150 |
| amazon:2 | nss-pkcs11-devel | 0 |
| amazon:2023 | nss-softokn | 0 |
| amazon:2 | nss-devel | 0 |
| amazon:2023 | nss-softokn-freebl | 0 |
| Mozilla | Thunderbird | 140.10, 150 |
| amazon:2023 | nspr-devel | 0 |
| amazon:2023 | nspr | 0 |
| amazon:2023 | nss-softokn-freebl-devel | 0 |
| chainguard | firefox | 0 |
| wolfi | firefox | 0 |
| amazon:2023 | nss-devel | 0 |
| amazon:2023 | nss-pkcs11-devel | 0 |
| chainguard | firefox-esr | 0, 0 |
| amazon:2023 | nss-softokn-devel | 0 |
| amazon:2023 | firefox | 0 |
| amazon:2 | nss-tools | 0 |
| amazon:2 | thunderbird | 0 |
| amazon:2 | nss-sysinit | 0 |
…and 7 more
Timeline
- Apr 21, 2026 CVE Published
- Apr 22, 2026 EPSS Score (30 in total, the first dated here)
- Apr 22, 2026 Security Advisory (34 in total, the first dated here)
- Apr 28, 2026 Distribution Patch (37 in total, the first dated here)
- Jul 14, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-6772
vulnetix vdb fixes CVE-2026-6772Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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