# CVE-2026-69247: python-cryptography: cryptography is a package designed to expose cryptographic primitives and recipes to Python developers

CVE-2026-69247 is fixed in 2 products on 1 platform, first by python3-cryptography 46.0.5-1ubuntu2.2, released August 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-69247
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 3, 2026

## Description

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 44.0.0 until 50.0.0, pkcs7_decrypt_der, pkcs7_decrypt_pem, and pkcs7_decrypt_smime reported the outcome of decrypting a RecipientInfo's encryptedKey in several distinguishable ways, one of which disclosed the exact length recovered from the RSA operation. The same distinction was also observable by timing. An application that decrypts attacker-supplied EnvelopedData and reflects the outcome gives the attacker a Bleichenbacher oracle against the content-encryption key. Decryption ran as RSA PKCS#1 v1.5 decrypt of encryptedKey, build an AES cipher from the result, then AES-CBC decrypt and PKCS#7 unpad. Invalid RSA padding, a valid padding with a bad key length, a correct length with a wrong key, and the real key each failed or succeeded differently. Case 1 is reachable only where the linked library lacks implicit rejection: OpenSSL 3.0 and 3.1, LibreSSL, and BoringSSL. Exploitation requires a service that auto-decrypts untrusted EnvelopedData matching the victim certificate and answers adaptively at high volume, such as an S/MIME gateway or mail filter. This issue is fixed in 50.0.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-cryptography Debian 14 | 49.0.0-2 | [DEBIAN-CVE-2026-69247](https://patchblox.com/security/data/fix/linux/debian-cve-2026-69247.md) | Aug 22, 2026 |
| Linux | python-cryptography opensuse-leap 16.0 | 44.0.3-160000.5.1 | [OPENSUSE-SU-2026:21685-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21685-1.md) | Aug 30, 2026 |
| Linux | python-cryptography sles 16.0 | 44.0.3-160000.5.1 | [SUSE-SU-2026:23570-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23570-1.md) | Aug 30, 2026 |
| Linux | python3-cryptography Ubuntu 26.04.1 LTS (resolute) | 46.0.5-1ubuntu2.2 | [python3-cryptography 46.0.5-1ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-cryptography-46.0.5-1ubuntu2.2.md) | Aug 3, 2026 |

---

Data as of 2026-11-08T06:59:42Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.