Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2017-1000158

CVE-2017-1000158CRITICAL

n/a n/a — CPython (aka Python) up to 2.7.13 is vulnerable to an integer overflow in the PyString_DecodeEscape function in stringobject.c, resulting…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0794   94.7     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Nov 16  Reserved by mitre
  Nov 17  Published (CNA: mitre)
  Oct 8   ENRICHED — CVE-2017-1000158. Received CVSS 9.8 and CPE data from NVD.

CWE-190 · CNA: mitre · CVSS v3.1 · 9 references · NVD status: Modified

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)

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 16, 2017	Reserved	Reserved by mitre
November 17, 2017	Published	Published (CNA: mitre)
October 8, 2026	ENRICHED	ENRICHED — CVE-2017-1000158. Received CVSS 9.8 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-190

References (9)

http://www.securitytracker.com/id/1039890 [Third Party Advisory, VDB Entry]
https://bugs.python.org/issue30657 [Issue Tracking, Patch, Vendor Advisory]
https://lists.debian.org/debian-lts-announce/2017/11/msg00035.html [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2017/11/msg00036.html [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2018/09/msg00030.html [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2018/09/msg00031.html [Mailing List, Third 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]

Authoritative record: CVE-2017-1000158 at cve.org

Weaknesses: CWE-190

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2017-1000158 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.