Vulnerability · Published Sep 14, 2026 · Assigned by mitre
CVE-2026-25832
Low 3.7
In plain English
A low-severity security flaw in Mbed TLS from TrustedFirmware. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.3%top 79.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.21 | mbedtls | 3.6.7-r0 | ALPINE-CVE-2026-25832 |
| Alpine:v3.22 | mbedtls | 3.6.7-r0 | ALPINE-CVE-2026-25832 |
| Alpine:v3.23 | mbedtls | 3.6.7-r0 | ALPINE-CVE-2026-25832 |
| Alpine:v3.24 | mbedtls | 4.1.1-r0 | ALPINE-CVE-2026-25832 |
| Alpine:v3.24 | mbedtls3 | 3.6.7-r0 | ALPINE-CVE-2026-25832 |
| Debian:12 | mbedtls | no fix listed | DEBIAN-CVE-2026-25832 |
| Debian:13 | mbedtls | no fix listed | DEBIAN-CVE-2026-25832 |
| Debian:14 | mbedtls | 3.6.7-2 | DEBIAN-CVE-2026-25832 |
| Ubuntu:26.04:LTS | mbedtls | no fix listed | UBUNTU-CVE-2026-25832 |
| Ubuntu:26.10 | mbedtls | no fix listed | UBUNTU-CVE-2026-25832 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TrustedFirmware | Mbed TLS | 3.5.0 – before 3.6.74.0.0 – before 4.1.2 |
Weakness: CWE-669 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N