# CVE-2026-44378: botan3: Botan is a C++ cryptography library

CVE-2026-44378 is fixed in botan3 on 1 platform, first by DEBIAN-CVE-2026-44378, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-44378
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0032
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 27, 2026

## Description

Botan is a C++ cryptography library. Prior to 3.12.0, certain patterns of indefinite length encodings in BER data could cause quadratic behavior in the parser, resulting in a denial of service. Such BER encodings were accepted even in structures which are required to be encoded as DER, which prohibits indefinite length encodings. This vulnerability is fixed in 3.12.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | botan3 Debian 13.5 (trixie) | 3.12.0+dfsg-2~deb13u1 | [DEBIAN-CVE-2026-44378](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44378.md) | Jun 24, 2026 |
| Linux | botan3 Debian 14 | 3.12.0+dfsg-2 | [DEBIAN-CVE-2026-44378](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44378.md) | Jun 24, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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