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
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 7.9%CVSS: 9.8Exploit: None knownExposed services: Not assessed

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
9.8CRITICALmedium confidence
EG Risk
62
EG Risk 62/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation8% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
7.9%
EPSS %ILE
94th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

November 17, 2017

Last Modified

October 8, 2026

Advisory Details (9)

Auto-updated Oct 8, 2026
Patch available.
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
genericMentions a patch (unverified)

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

https://lists.debian.org/debian-lts-announce/2018/09/msg00031.html
genericMentions a patch (unverified)

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

https://lists.debian.org/debian-lts-announce/2018/09/msg00030.html
genericMentions a patch (unverified)

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

https://lists.debian.org/debian-lts-announce/2017/11/msg00036.html
genericMentions a patch (unverified)

[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
generic
http://www.securitytracker.com/id/1039890

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython2.7 (2.7.3-0ubuntu3.10) @ precise2026-10-08ubuntu
ubuntupython2.7-minimal (2.7.13-2ubuntu0.1) @ zesty2026-10-08ubuntu
ubuntupython3.5-minimal (3.5.3-1ubuntu0~17.04.2) @ zesty2026-10-08ubuntu

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.

Affected Packages

(9 across 7 ecosystems)
Debian:7(2)
PackageVulnerable rangeFix by version rangeDependents
python2.62.6.8-1.1
  • every version up to 2.6.8-1.1+deb7u1: fixed in 2.6.8-1.1+deb7u1
—
python2.72.7.3-6, 2.7.3-6+deb7u1, 2.7.3-6+deb7u2, 2.7.3-6+deb7u3
  • every version up to 2.7.3-6+deb7u4: fixed in 2.7.3-6+deb7u4
—
Debian:8(2)
PackageVulnerable rangeFix by version rangeDependents
python2.72.7.9-2, 2.7.9-2+deb8u1
  • every version up to 2.7.9-2+deb8u2: fixed in 2.7.9-2+deb8u2
—
python3.43.4.2-1
  • every version up to 3.4.2-1+deb8u1: fixed in 3.4.2-1+deb8u1
—
Alpine:v3.4(1)
PackageVulnerable rangeFix by version rangeDependents
python—
  • 3.4.0 up to 2.7.14-r0: fixed in 2.7.14-r0
—
Alpine:v3.5(1)
PackageVulnerable rangeFix by version rangeDependents
python2—
  • every version up to 2.7.14-r0: fixed in 2.7.14-r0
—
Alpine:v3.6(1)
PackageVulnerable rangeFix by version rangeDependents
python2—
  • every version up to 2.7.14-r0: fixed in 2.7.14-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
python2.7—
  • every version up to 2.7.13-4: fixed in 2.7.13-4
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
python3.53.5.3-1
  • every version up to 3.5.3-1+deb9u1: fixed in 3.5.3-1+deb9u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

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 11× in last 7d / 29× 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.

Showing the most recent 100 of 172 total refreshes for this CVE.

  1. 2026-10-09 20:01 UTCEPSS rescore
  2. 2026-10-08 21:26 UTCEG score recompute
  3. 2026-10-08 21:26 UTCVendor advisory
  4. 2026-10-08 21:26 UTCGHSA enrichment
  5. 2026-10-08 16:35 UTCEPSS rescore
  6. 2026-10-07 23:40 UTCEPSS rescore
  7. 2026-10-06 15:11 UTCEPSS rescore
  8. 2026-10-05 17:38 UTCEPSS rescore
  9. 2026-10-04 11:31 UTCOSV refresh
  10. 2026-10-03 14:21 UTCEPSS rescore
  11. 2026-10-03 14:21 UTCEPSS rescore
  12. 2026-09-30 14:58 UTCEPSS rescore
  13. 2026-09-30 09:20 UTCEG score recompute
  14. 2026-09-28 13:45 UTCEPSS rescore
  15. 2026-09-27 13:40 UTCEPSS rescore
  16. 2026-09-26 15:53 UTCEPSS rescore
  17. 2026-09-26 15:53 UTCEPSS rescore
  18. 2026-09-24 13:59 UTCEPSS rescore
  19. 2026-09-23 13:41 UTCEPSS rescore
  20. 2026-09-19 15:35 UTCEPSS rescore
  21. 2026-09-18 19:22 UTCEPSS rescore
  22. 2026-09-17 19:22 UTCEPSS rescore
  23. 2026-09-16 05:05 UTCEPSS rescore
  24. 2026-09-15 03:05 UTCEPSS rescore
  25. 2026-09-15 01:14 UTCOSV refresh
Show 75 more
  1. 2026-09-13 16:41 UTCEPSS rescore
  2. 2026-09-12 14:55 UTCEPSS rescore
  3. 2026-09-11 14:46 UTCEPSS rescore
  4. 2026-09-11 09:31 UTCEPSS rescore
  5. 2026-09-10 09:26 UTCEPSS rescore
  6. 2026-09-07 15:56 UTCEPSS rescore
  7. 2026-09-04 13:56 UTCEPSS rescore
  8. 2026-09-02 14:07 UTCEPSS rescore
  9. 2026-09-01 13:48 UTCEPSS rescore
  10. 2026-09-01 03:31 UTCEPSS rescore
  11. 2026-08-28 21:35 UTCEPSS rescore
  12. 2026-08-27 14:20 UTCEPSS rescore
  13. 2026-08-27 00:37 UTCOSV refresh
  14. 2026-08-26 14:41 UTCEPSS rescore
  15. 2026-08-25 13:44 UTCEPSS rescore
  16. 2026-08-21 23:44 UTCEPSS rescore
  17. 2026-08-19 16:59 UTCEPSS rescore
  18. 2026-08-18 13:43 UTCEPSS rescore
  19. 2026-08-17 13:42 UTCEPSS rescore
  20. 2026-08-16 14:51 UTCEPSS rescore
  21. 2026-08-16 02:10 UTCEPSS rescore
  22. 2026-08-15 01:25 UTCEPSS rescore
  23. 2026-08-12 13:46 UTCEPSS rescore
  24. 2026-08-11 13:36 UTCEPSS rescore
  25. 2026-08-10 14:38 UTCOSV refresh
  26. 2026-08-09 13:42 UTCEPSS rescore
  27. 2026-08-08 16:32 UTCEPSS rescore
  28. 2026-08-07 16:22 UTCEPSS rescore
  29. 2026-08-06 13:42 UTCEPSS rescore
  30. 2026-08-05 19:12 UTCEPSS rescore
  31. 2026-08-04 15:05 UTCEPSS rescore
  32. 2026-08-02 02:22 UTCEPSS rescore
  33. 2026-08-01 04:11 UTCEPSS rescore
  34. 2026-07-30 16:24 UTCEPSS rescore
  35. 2026-07-30 01:26 UTCEPSS rescore
  36. 2026-07-30 01:26 UTCEPSS rescore
  37. 2026-07-28 15:31 UTCEPSS rescore
  38. 2026-07-26 14:50 UTCEPSS rescore
  39. 2026-07-25 15:30 UTCOSV refresh
  40. 2026-07-25 14:13 UTCEPSS rescore
  41. 2026-07-24 14:13 UTCEPSS rescore
  42. 2026-07-23 14:15 UTCEPSS rescore
  43. 2026-07-23 01:25 UTCEG score recompute
  44. 2026-07-22 22:04 UTCEG score recompute
  45. 2026-07-22 14:04 UTCEPSS rescore
  46. 2026-07-21 15:21 UTCEPSS rescore
  47. 2026-07-21 15:21 UTCEPSS rescore
  48. 2026-07-20 17:04 UTCEPSS rescore
  49. 2026-07-19 14:28 UTCEPSS rescore
  50. 2026-07-19 14:28 UTCEPSS rescore
  51. 2026-07-19 02:26 UTCEPSS rescore
  52. 2026-07-19 02:26 UTCEPSS rescore
  53. 2026-07-18 10:00 UTCEPSS rescore
  54. 2026-07-18 10:00 UTCEPSS rescore
  55. 2026-07-16 16:59 UTCEPSS rescore
  56. 2026-07-16 16:59 UTCEPSS rescore
  57. 2026-07-15 16:54 UTCEPSS rescore
  58. 2026-07-15 16:54 UTCEPSS rescore
  59. 2026-07-15 01:56 UTCEPSS rescore
  60. 2026-07-13 22:26 UTCEPSS rescore
  61. 2026-07-13 06:09 UTCEPSS rescore
  62. 2026-07-12 05:43 UTCEPSS rescore
  63. 2026-07-12 05:43 UTCEPSS rescore
  64. 2026-07-11 08:24 UTCEPSS rescore
  65. 2026-07-09 19:06 UTCEPSS rescore
  66. 2026-07-08 15:10 UTCEPSS rescore
  67. 2026-07-08 09:57 UTCOSV refresh
  68. 2026-07-07 13:42 UTCEPSS rescore
  69. 2026-07-06 02:20 UTCEPSS rescore
  70. 2026-07-06 02:20 UTCEPSS rescore
  71. 2026-07-05 02:27 UTCEPSS rescore
  72. 2026-07-04 06:28 UTCEPSS rescore
  73. 2026-07-01 15:02 UTCEPSS rescore
  74. 2026-06-30 23:19 UTCEPSS rescore
  75. 2026-06-30 23:19 UTCEPSS rescore

Related CVEs(same product + same CWE)

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 on November 17, 2017, with the most recent update on October 8, 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 7.9% probability of exploitation in the next 30 days (94th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2017-1000158 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-1000158

Explore →

Is Your Infrastructure Affected by CVE-2017-1000158?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs