CVE-2026-3833
7.4
HIGH
CVSS 3.1
EPSS 0.57%
描述
A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `nameConstraints` labels, specifically for `dNSName` (DNS) or `rfc822Name` (email) constraints within `excludedSubtrees` or `permittedSubtrees`. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.
如何修補 CVE-2026-3833
要修補 CVE-2026-3833,請將受影響套件升級到下列已修補版本。
- —升級至 3.8.13-r0 或更新版本
- —升級至 3.7.1-5+deb11u10 或更新版本
CVE-2026-3833 正在被利用嗎?
低 — EPSS 為 0.6%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 3.8.13-r0
- from 0, < 3.7.1-5+deb11u10
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |