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Vulnerability record · CVE-2017-1000158 · published 17 November 2017

CVE-2017-1000158: Python integer overflow vulnerability

Python · Python

CPython (aka Python) up to 2.7.13 is vulnerable to an integer overflow in the PyString_DecodeEscape function in stringobject.c, resulting in heap-based buffer overflow (and possible arbitrary code execution)

9.8 CVSS 3.1 Critical EPSS 7.9% · top 5.5% CWE-190 · Integer overflow
9.8CVSS 3.1 base score, v2 7.5
7.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

CPython (aka Python) up to 2.7.13 is vulnerable to an integer overflow in the PyString_DecodeEscape function in stringobject.c, resulting in heap-based buffer overflow (and possible arbitrary code execution)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securitytracker.com/id/1039890 Third Party AdvisoryVDB Entry
https://bugs.python.org/issue30657 Issue TrackingPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00035.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00036.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00030.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00031.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201805-02 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0001/
https://www.debian.org/security/2018/dsa-4307 Third Party Advisory
http://www.securitytracker.com/id/1039890 Third Party AdvisoryVDB Entry
https://bugs.python.org/issue30657 Issue TrackingPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00035.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00036.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00030.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00031.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201805-02 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0001/
https://www.debian.org/security/2018/dsa-4307 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-1000158), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.