CVE-2016-6902

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 9.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

lshell 0.9.16 allows remote authenticated users to break out of a limited shell and execute arbitrary commands.

CVSS v3
9.9
EG Score
9.9(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: Track

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
Severity99% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
92%
KEV
Not listed

Published

April 24, 2017

Last Modified

June 17, 2026

Advisory Details (6)

Auto-updated Aug 23, 2026
Patch available. Sources: redhat, github_commit.
redhat

1369345 – (CVE-2016-6902, CVE-2016-6903) CVE-2016-6902 CVE-2016-6903 lshell: Shell outbreak vulnerabilities via bad syntax parse and multiline commands

https://bugzilla.redhat.com/show_bug.cgi?id=1369345
generic Patch Available

#834949 - lshell: CVE-2016-6902: Shell outbreak due to bad syntax parse - Debian Bug report logs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=834949
generic

CVE-2016-6902 - PSIRT.COM

http://www.securityfocus.com/bid/92591
generic

oss-security - Re: CVE Request: lshell: shell outbreak vulnerabilities via bad syntax parse and multiline commands

http://www.openwall.com/lists/oss-security/2016/08/22/17
generic

Restriction overrun via simple trick · Issue #147 · ghantoos/lshell · GitHub

https://github.com/ghantoos/lshell/issues/147
github_commit

commit a686f71732a3 (ghantoos/lshell)

Fix landed in ghantoos/lshell commit a686f71732a3 — awaiting tagged release

https://github.com/ghantoos/lshell/commit/a686f71732a3d0f16df52ef46ab8a49ee0083c68

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
limited-shell———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 25× 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 136 total refreshes for this CVE.

  1. 2026-08-27 14:20 UTCEPSS rescore
  2. 2026-08-26 14:41 UTCEPSS rescore
  3. 2026-08-26 13:43 UTCOSV refresh
  4. 2026-08-25 13:44 UTCEPSS rescore
  5. 2026-08-21 23:44 UTCEPSS rescore
  6. 2026-08-19 16:59 UTCEPSS rescore
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  14. 2026-08-10 02:40 UTCOSV refresh
  15. 2026-08-09 13:42 UTCEPSS rescore
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  1. 2026-07-28 15:31 UTCEPSS rescore
  2. 2026-07-25 14:13 UTCEPSS rescore
  3. 2026-07-25 03:11 UTCOSV refresh
  4. 2026-07-24 14:13 UTCEPSS rescore
  5. 2026-07-23 14:15 UTCEPSS rescore
  6. 2026-07-23 01:24 UTCEG score recompute
  7. 2026-07-22 22:03 UTCEG score recompute
  8. 2026-07-22 14:04 UTCEPSS rescore
  9. 2026-07-21 15:21 UTCEPSS rescore
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  11. 2026-07-20 17:04 UTCEPSS rescore
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  18. 2026-07-16 16:59 UTCEPSS rescore
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  20. 2026-07-15 16:54 UTCEPSS rescore
  21. 2026-07-15 16:54 UTCEPSS rescore
  22. 2026-07-15 01:56 UTCEPSS rescore
  23. 2026-07-13 22:26 UTCEPSS rescore
  24. 2026-07-13 06:09 UTCEPSS rescore
  25. 2026-07-12 05:43 UTCEPSS rescore
  26. 2026-07-12 05:43 UTCEPSS rescore
  27. 2026-07-11 08:24 UTCEPSS rescore
  28. 2026-07-09 19:06 UTCEPSS rescore
  29. 2026-07-08 15:10 UTCEPSS rescore
  30. 2026-07-07 21:42 UTCOSV refresh
  31. 2026-07-06 16:24 UTCEPSS rescore
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  40. 2026-06-29 14:03 UTCEPSS rescore
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  43. 2026-06-27 03:05 UTCEPSS rescore
  44. 2026-06-25 13:47 UTCEPSS rescore
  45. 2026-06-24 14:02 UTCEPSS rescore
  46. 2026-06-23 21:30 UTCEPSS rescore
  47. 2026-06-22 14:23 UTCEPSS rescore
  48. 2026-06-21 14:54 UTCEPSS rescore
  49. 2026-06-21 14:54 UTCEPSS rescore
  50. 2026-06-21 01:57 UTCEPSS rescore
  51. 2026-06-21 01:57 UTCEPSS rescore
  52. 2026-06-19 19:23 UTCEPSS rescore
  53. 2026-06-19 19:23 UTCEPSS rescore
  54. 2026-06-19 09:25 UTCOSV refresh
  55. 2026-06-18 17:50 UTCEPSS rescore
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  57. 2026-06-17 17:50 UTCEPSS rescore
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  63. 2026-06-13 22:57 UTCEPSS rescore
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  65. 2026-06-12 23:09 UTCEPSS rescore
  66. 2026-06-11 13:57 UTCEPSS rescore
  67. 2026-06-08 14:14 UTCEPSS rescore
  68. 2026-06-07 15:22 UTCEPSS rescore
  69. 2026-06-07 15:22 UTCEPSS rescore
  70. 2026-06-06 13:45 UTCEPSS rescore
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  73. 2026-06-05 06:08 UTCEPSS rescore
  74. 2026-06-05 06:08 UTCEPSS rescore
  75. 2026-06-04 13:10 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2016-6902?
CVE-2016-6902 is a critical vulnerability published on April 24, 2017. lshell 0.9.16 allows remote authenticated users to break out of a limited shell and execute arbitrary commands.
When was CVE-2016-6902 disclosed?
CVE-2016-6902 was first published in the National Vulnerability Database on April 24, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-6902 actively exploited?
CVE-2016-6902 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.3% of all scored CVEs.
What is the CVSS score of CVE-2016-6902?
CVE-2016-6902 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2016-6902?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-6902, 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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