CVE-2017-1000158

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 8%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
9.8
EG Score
9.8(medium)
EPSS
94.0%
KEV
Not listed

Published

November 17, 2017

Last Modified

May 13, 2026

Advisory Details (9)

Auto-updated May 15, 2026
Patch available.
generic
http://www.securitytracker.com/id/1039890
generic

[SECURITY] [DSA 4307-1] python3.5 security update

https://www.debian.org/security/2018/dsa-4307
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20230216-0001/
generic

Python: Buffer overflow (GLSA 201805-02) — Gentoo security

https://security.gentoo.org/glsa/201805-02
generic Patch Available

[SECURITY] [DLA 1520-1] python3.4 security update

https://lists.debian.org/debian-lts-announce/2018/09/msg00031.html
generic Patch Available

[SECURITY] [DLA 1519-1] python2.7 security update

https://lists.debian.org/debian-lts-announce/2018/09/msg00030.html
generic Patch Available

[SECURITY] [DLA 1190-1] python2.6 security update

https://lists.debian.org/debian-lts-announce/2017/11/msg00036.html
generic Patch Available

[SECURITY] [DLA 1189-1] python2.7 security update

https://lists.debian.org/debian-lts-announce/2017/11/msg00035.html
generic

Issue 30657: [security] CVE-2017-1000158: Unsafe arithmetic in PyString_DecodeEscape - Python tracker

https://bugs.python.org/issue30657

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3.5-minimal (3.5.3-1ubuntu0~17.04.2) @ zesty2026-05-20ubuntu
ubuntupython2.7-minimal (2.7.13-2ubuntu0.1) @ zesty2026-05-20ubuntu
ubuntupython2.7 (2.7.3-0ubuntu3.10) @ precise2026-05-20ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 02:20 UTCEPSS rescore
  3. 2026-07-06 02:20 UTCEPSS rescore
  4. 2026-07-05 02:27 UTCEPSS rescore
  5. 2026-07-04 06:28 UTCEPSS rescore
  6. 2026-07-01 15:02 UTCEPSS rescore
  7. 2026-06-30 23:19 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
  9. 2026-06-29 14:03 UTCEPSS rescore
  10. 2026-06-28 04:53 UTCEPSS rescore
  11. 2026-06-27 03:05 UTCEPSS rescore
  12. 2026-06-25 13:47 UTCEPSS rescore
  13. 2026-06-24 14:02 UTCEPSS rescore
  14. 2026-06-23 21:30 UTCEPSS rescore
  15. 2026-06-22 14:23 UTCEPSS rescore
  16. 2026-06-21 01:57 UTCEPSS rescore
  17. 2026-06-21 01:57 UTCEPSS rescore
  18. 2026-06-19 21:52 UTCOSV refresh
  19. 2026-06-19 19:23 UTCEPSS rescore
  20. 2026-06-19 19:23 UTCEPSS rescore
  21. 2026-06-18 17:50 UTCEPSS rescore
  22. 2026-06-18 17:50 UTCEPSS rescore
  23. 2026-06-17 17:50 UTCEPSS rescore
  24. 2026-06-17 17:50 UTCEPSS rescore
  25. 2026-06-16 17:50 UTCEPSS rescore
Show 63 more
  1. 2026-06-15 17:45 UTCEPSS rescore
  2. 2026-06-14 23:14 UTCEPSS rescore
  3. 2026-06-14 23:14 UTCEPSS rescore
  4. 2026-06-13 22:57 UTCEPSS rescore
  5. 2026-06-13 22:57 UTCEPSS rescore
  6. 2026-06-12 23:09 UTCEPSS rescore
  7. 2026-06-11 13:57 UTCEPSS rescore
  8. 2026-06-08 14:14 UTCEPSS rescore
  9. 2026-06-06 13:45 UTCEPSS rescore
  10. 2026-06-06 13:45 UTCEPSS rescore
  11. 2026-06-05 22:44 UTCEPSS rescore
  12. 2026-06-05 06:08 UTCEPSS rescore
  13. 2026-06-05 06:08 UTCEPSS rescore
  14. 2026-06-04 13:10 UTCEPSS rescore
  15. 2026-06-04 13:10 UTCEPSS rescore
  16. 2026-06-02 20:10 UTCEPSS rescore
  17. 2026-05-31 22:28 UTCEPSS rescore
  18. 2026-05-31 22:28 UTCEPSS rescore
  19. 2026-05-31 01:25 UTCOSV refresh
  20. 2026-05-31 00:14 UTCEPSS rescore
  21. 2026-05-29 13:41 UTCEPSS rescore
  22. 2026-05-28 13:42 UTCEPSS rescore
  23. 2026-05-28 13:42 UTCEPSS rescore
  24. 2026-05-27 13:38 UTCEPSS rescore
  25. 2026-05-27 13:38 UTCEPSS rescore
  26. 2026-05-26 13:42 UTCEPSS rescore
  27. 2026-05-26 13:42 UTCEPSS rescore
  28. 2026-05-26 07:17 UTCEPSS rescore
  29. 2026-05-24 16:44 UTCEPSS rescore
  30. 2026-05-22 21:15 UTCEPSS rescore
  31. 2026-05-20 22:37 UTCEPSS rescore
  32. 2026-05-20 22:37 UTCEPSS rescore
  33. 2026-05-20 22:37 UTCEPSS rescore
  34. 2026-05-20 11:21 UTCEPSS rescore
  35. 2026-05-20 11:21 UTCEPSS rescore
  36. 2026-05-20 10:15 UTCEG score recompute
  37. 2026-05-20 10:15 UTCVendor advisory
  38. 2026-05-20 10:15 UTCGHSA enrichment
  39. 2026-05-20 05:56 UTCEG score recompute
  40. 2026-05-20 05:56 UTCVendor advisory
  41. 2026-05-20 05:56 UTCGHSA enrichment
  42. 2026-05-20 01:37 UTCEG score recompute
  43. 2026-05-20 01:37 UTCGHSA enrichment
  44. 2026-05-19 21:18 UTCEG score recompute
  45. 2026-05-19 21:18 UTCVendor advisory
  46. 2026-05-19 21:18 UTCGHSA enrichment
  47. 2026-05-19 16:59 UTCEG score recompute
  48. 2026-05-19 16:59 UTCVendor advisory
  49. 2026-05-19 16:59 UTCGHSA enrichment
  50. 2026-05-19 12:40 UTCEG score recompute
  51. 2026-05-19 12:40 UTCVendor advisory
  52. 2026-05-19 12:40 UTCGHSA enrichment
  53. 2026-05-19 08:20 UTCEG score recompute
  54. 2026-05-19 08:20 UTCVendor advisory
  55. 2026-05-19 08:20 UTCGHSA enrichment
  56. 2026-05-19 04:02 UTCEG score recompute
  57. 2026-05-19 04:02 UTCVendor advisory
  58. 2026-05-19 04:02 UTCGHSA enrichment
  59. 2026-05-18 23:40 UTCEG score recompute
  60. 2026-05-18 23:40 UTCVendor advisory
  61. 2026-05-18 21:30 UTCEPSS rescore
  62. 2026-05-18 21:30 UTCEPSS rescore
  63. 2026-05-18 21:30 UTCEPSS rescore

Frequently asked(5)

What is CVE-2017-1000158?
CVE-2017-1000158 is a critical vulnerability published on November 17, 2017. 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)
When was CVE-2017-1000158 disclosed?
CVE-2017-1000158 was first published in the National Vulnerability Database on November 17, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-1000158 actively exploited?
CVE-2017-1000158 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-1000158?
CVE-2017-1000158 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-1000158?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-1000158, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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