CVE-2026-69247

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.

CVSS Metrics

• v4.0•HIGH•Score: 8.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
• v4.0•HIGH•Score: 8.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Trends

Current EPSS score: 0.18%• Percentile: 7%

Techniques & Countermeasures

• CWE-208•Observable Timing Discrepancy

  Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.

• CWE-209•Generation of Error Message Containing Sensitive Information

  The product generates an error message that includes sensitive information about its environment, users, or associated data.

Affected Systems

• chainguard•airflow-2

  all

• chainguard•airflow-3

  < 3.3.0-r4

• chainguard•airflow-3-iamguarded-compat

  all

• chainguard•airflow-core-2

  all

• chainguard•airflow-core-3

  < 3.3.0-r5

• chainguard•ansible-operator

  < 1.42.3-r8 | < 1.42.3-r9

• chainguard•ansible-operator-fips

  < 1.42.3-r5

• chainguard•apache-beam-python-3.11-sdk

  < 2.75.0-r3

• chainguard•apache-beam-python-3.12-sdk

  < 2.75.0-r2

• chainguard•apache-beam-python-3.13-sdk

  < 2.75.0-r4

• chainguard•apache-beam-python-3.14-sdk

  < 2.75.0-r2

• chainguard•authentik-2025.12

  all

• chainguard•authentik-2026.2

  < 2026.2.6-r15

• chainguard•authentik-2026.5

  < 2026.5.6-r8

• chainguard•awx

  < 24.6.1-r49

• chainguard•az

  all

• chainguard•azureml-inference-server-http

  < 1.5.1-r8

• chainguard•barman

  < 3.19.1-r5

• chainguard•barman-cloudnative-pg

  < 3.19.1-r5

• chainguard•crossplane-function-pythonic

  < 0.6.1-r2

• chainguard•dagster

  < 1.13.16-r1

• chainguard•dask-kubernetes

  < 2026.3.0-r11

• chainguard•dask-kubernetes-fips

  < 2026.3.0-r7

• chainguard•datadog-agent-7.71-core-integrations

  all

• chainguard•datadog-agent-7.72-core-integrations

  all

• chainguard•datadog-agent-7.73-core-integrations

  all

• chainguard•datadog-agent-7.74-core-integrations

  all

• chainguard•datadog-agent-7.75-core-integrations

  all

• chainguard•datadog-agent-7.76-core-integrations

  all

• chainguard•datadog-agent-7.77-core-integrations

  all

• chainguard•datadog-agent-7.78-core-integrations

  all

• chainguard•datadog-agent-7.79-core-integrations

  all

• chainguard•datadog-agent-7.80-core-integrations

  < 7.80.4-r10

• chainguard•datadog-agent-fips-7.71-core-integrations

  all

• chainguard•datadog-agent-fips-7.72-core-integrations

  all

• chainguard•datadog-agent-fips-7.73-core-integrations

  all

• chainguard•datadog-agent-fips-7.74-core-integrations

  all

• chainguard•datadog-agent-fips-7.75-core-integrations

  all

• chainguard•datadog-agent-fips-7.76-core-integrations

  all

• chainguard•datadog-agent-fips-7.77-core-integrations

  all

• chainguard•datadog-agent-fips-7.78-core-integrations

  all

• chainguard•datadog-agent-fips-7.79-core-integrations

  all

• chainguard•datadog-agent-fips-7.80-core-integrations

  < 7.80.4-r10

• chainguard•datadog-agent-fips-7.81-core-integrations

  < 7.81.3-r1

• chainguard•dbt-bigquery

  < 1.10.3-r7

• chainguard•dbt-snowflake

  all

• chainguard•duplicity

  < 3.1.0-r2

• chainguard•ggshield

  < 1.53.0-r1

• chainguard•gitlab-toolbox-ce-19.2

  < 19.2.1-r1

• chainguard•gitlab-toolbox-ce-fips-18.11

  all

Showing first 50 affected entries in server-rendered view.

References (12)

• https://github.com/pyca/cryptography/security/advisories/GHSA-g6cj-pr64-35w5
• https://github.com/pyca/cryptography/pull/15369
• https://github.com/pyca/cryptography/commit/53fccd93413a8d7f07d6d8999681f27b75cffa3f
• https://github.com/pyca/cryptography
• https://pypi.org/project/cryptography
• https://github.com/advisories/GHSA-g6cj-pr64-35w5
• https://nvd.nist.gov/vuln/detail/CVE-2026-69247
• https://ubuntu.com/security/CVE-2026-69247
• https://www.cve.org/CVERecord?id=CVE-2026-69247
• https://security-tracker.debian.org/tracker/CVE-2026-69247
• https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69247.json
• https://ubuntu.com/security/notices/USN-8776-1