# CVE-2018-1060: Python 3.5 and 1 other: python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking…

CVE-2018-1060 is fixed in Python 3.6 on 1 platform by Python 3.6 3.6.5 (version 3.6.5), released March 28, 2018. 1 other affected product has no fix yet. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2018-1060
- Priority: High
- CVSS: 7.5
- EPSS: 0.0504
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 18, 2018
- Weakness: CWE-20
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2018-1060

## Description

python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in pop3lib's apop() method. An attacker could use this flaw to cause denial of service.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Python 3.6 | 3.6.5 | [Python 3.6 3.6.5](https://patchblox.com/security/data/fix/windows-app/python.python.3.6-3.6.5.md) | Mar 28, 2018 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| Windows apps | Python 3.5 | no-fix |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo