CVE-2026-118765 Botan: AutoSeeded_RNG can become reinitialized from predictable data after clearing state
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-118765?
CVE-2026-118765 is a high-severity vulnerability in randombit botan, published on 29 Oct 2026.
Official description
Botan is a C++ cryptography library. From 3.7.0 until 3.13.0, an application that calls AutoSeeded_RNG::clear() and then calls randomize with an empty output buffer while the generator is unseeded can cause AutoSeeded_RNG to mark itself seeded without consulting the configured entropy source. On builds without BOTAN_HAS_SYSTEM_RNG, the fallback uses only a clock value and process ID, so a later non-empty request can produce output from predictable state. This issue is fixed in version 3.13.0.
Weakness: CWE-335
Which versions are affected by CVE-2026-118765?
How do I fix CVE-2026-118765?
No fix has been published for CVE-2026-118765 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-118765 being exploited?
There is no known exploitation of CVE-2026-118765 in the wild and no public exploit code.
Sources
Also known as GHSA-95xx-xh9v-v9c4.