CVE-2026-59885

Description

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER, CER, and DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs, so a small crafted payload containing an OID with many arcs consumes excessive CPU per decode() call and can deny service to applications that decode untrusted ASN.1 data. The corresponding encoders have the same quadratic behavior when an application re-encodes previously decoded attacker-supplied values. This issue is fixed in version 0.6.4.

CVSS Metrics

• v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.34%• Percentile: 27%

Techniques & Countermeasures

• CWE-400•Uncontrolled Resource Consumption

  The product does not properly control the allocation and maintenance of a limited resource.

• CWE-407•Inefficient Algorithmic Complexity

  An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.

Affected Systems

• chainguard•airflow-2

  all

• chainguard•airflow-3

  < 3.3.0-r4

• chainguard•airflow-3-iamguarded-compat

  all

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

  < 2.75.0-r1

• chainguard•authentik-2026.2

  < 2026.2.6-r11

• chainguard•authentik-2026.5

  < 2026.5.6-r1

• chainguard•authentik-fips-2026.2

  < 2026.2.6-r11

• chainguard•authentik-fips-2026.5

  < 2026.5.6-r3

• chainguard•awx

  < 24.6.1-r45

• chainguard•azureml-inference-server-http-fips

  < 1.5.1-r6

• chainguard•barman-cloudnative-pg

  < 3.19.1-r4

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

  all

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

  all

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

  < 7.73.3-r23

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

  < 7.74.1-r24

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

  all

• chainguard•datadog-agent-7.76

  < 7.76.3-r41

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

  < 7.76.3-r34

• 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

  < 7.73.3-r26

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

  < 7.74.1-r26

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

  < 7.75.4-r10

• chainguard•datahub-ingestion

  < 1.6.0-r5

• chainguard•datahub-ingestion-fips

  < 1.6.0-r6

• chainguard•dbt-bigquery

  < 1.10.3-r6

• chainguard•duplicity

  < 3.1.0-r2

• chainguard•gitlab-toolbox-ce-19.1

  < 19.1.3-r0

• chainguard•k8s-sidecar

  < 2.9.0-r0

• chainguard•kserve

  < 0.20.0-r7

• chainguard•kserve-localmodel

  < 0.20.0-r7

• chainguard•kserve-storage-controller

  < 0.19.0-r5 | all | < 0.20.0-r7

• chainguard•kubeflow-jupyter-web-app

  < 1.10.0-r23

• chainguard•kubeflow-pipelines-apiserver

  < 2.17.0-r4 | < 2.17.2-r4

• chainguard•kubeflow-pipelines-apiserver-fips

  < 2.17.0-r5

• chainguard•kubeflow-pipelines-metadata-writer-compat

  < 2.17.2-r4

• chainguard•kubeflow-pipelines-visualization-server

  < 2.17.0-r1

• chainguard•kubeflow-profile-controller

  all

• chainguard•kubeflow-tensorboard-web-app

  < 1.10.0-r28

• chainguard•kubeflow-volumes-web-app

  < 1.10.0-r22

• chainguard•label-studio

  < 1.23.0-r11

• chainguard•litellm

  < 1.93.0-r2

• chainguard•lmcache-cuda-12.8

  < 0.5.3-r0

• chainguard•localstack

  < 4.14.0-r20

• chainguard•metaflow-service

  < 2.5.1-r1

• chainguard•metaflow-service-fips

  < 2.5.1-r2

• chainguard•mitmproxy

  < 12.2.3-r4

• chainguard•mlflow

  < 3.15.0-r1 | < 3.16.0-r0

• chainguard•mlflow-iamguarded-compat

  < 3.15.0-r1

• chainguard•openstack-keystone-2025.1

  < 27.0.1_git20260618-r7

Showing first 50 affected entries in server-rendered view.

References (9)

• https://github.com/pyasn1/pyasn1/security/advisories/GHSA-8ppf-4f7h-5ppj
• https://github.com/pyasn1/pyasn1/commit/45bdb19eb7df4b3780fe9c912c63e99bffc39dd9
• https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4
• https://nvd.nist.gov/vuln/detail/CVE-2026-59885
• https://github.com/pyasn1/pyasn1
• https://security-tracker.debian.org/tracker/CVE-2026-59885
• https://ubuntu.com/security/CVE-2026-59885
• https://www.cve.org/CVERecord?id=CVE-2026-59885
• https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59885.json