---
id: CVE-2026-118765
title: >-
  Botan: AutoSeeded_RNG can become reinitialized from predictable data after
  clearing state
summary: >-
  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 …
severity: high
cvss: 7.3
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-335
vendor: randombit
product: botan
affected:
  - 'botan >= 3.7.0, < 3.13.0'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-29T20:19:42.210615Z'
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T20:19:55.406Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118765'
references:
  - url: 'https://github.com/randombit/botan/security/advisories/GHSA-95xx-xh9v-v9c4'
    label: 'https://github.com/randombit/botan/security/advisories/GHSA-95xx-xh9v-v9c4'
  - url: 'https://github.com/randombit/botan/pull/5838'
    label: 'https://github.com/randombit/botan/pull/5838'
  - url: >-
      https://github.com/randombit/botan/commit/a7389222ace990604b6985add91ee06f55a80c0e
    label: >-
      https://github.com/randombit/botan/commit/a7389222ace990604b6985add91ee06f55a80c0e
tags:
  - cve.org
epss: 0.00145
epssPercentile: 0.03779
ingestedAt: '2026-11-02T21:30:04.847Z'
---

## Overview

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.

## Affected

- `botan >= 3.7.0, < 3.13.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.