# python-pyasn1 0.4.2-3ubuntu0.20.04.1~esm2: python-pyasn1 0.4.2-3ubuntu0.20.04.1~esm2 for Ubuntu 20.04.3 LTS (focal)

python-pyasn1 0.4.2-3ubuntu0.20.04.1~esm2, released November 14, 2026, fixes 6 CVEs in python-pyasn1. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-focal-python-pyasn1-0.4.2-3ubuntu0.20.04.1-esm2
- Platform: Linux
- Released: Nov 14, 2026
- Priority: High (Closes CVE-2026-59885, high severity)
- CVEs: 6, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [python-pyasn1](https://patchblox.com/security/data/product/linux/python-pyasn1.md) | Ubuntu 20.04.3 LTS (focal) | 0.4.2-3ubuntu0.20.04.1~esm2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-59884](https://patchblox.com/security/data/cve/CVE-2026-59884.md) | High | pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs | 7.5 | 0.0062 |  |
| [CVE-2026-59885](https://patchblox.com/security/data/cve/CVE-2026-59885.md) | High | pyasn1: Quadratic complexity in OBJECT IDENTIFIER and RELATIVE-OID processing allows denial of service | 7.5 | 0.0062 |  |
| [CVE-2026-59886](https://patchblox.com/security/data/cve/CVE-2026-59886.md) | High | pyasn1: Uncontrolled resource consumption when converting decoded REAL values | 7.5 | 0.0044 |  |
| [CVE-2026-119194](https://patchblox.com/security/data/cve/CVE-2026-119194.md) | High | pyasn1: Quadratic CPU use in schemaless BER/CER/DER container decoding | 7.5 | 0.0043 |  |
| [CVE-2026-119196](https://patchblox.com/security/data/cve/CVE-2026-119196.md) | High | pyasn1: Quadratic CPU consumption in constructed BIT STRING decoding | 7.5 | 0.0043 |  |
| [CVE-2026-119197](https://patchblox.com/security/data/cve/CVE-2026-119197.md) | High | pyasn1: Quadratic-complexity denial of service in binary REAL decoding | 7.5 | 0.0043 |  |

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Data as of 2026-11-14T20:11:19Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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