CVE-2026-73055

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-16. A secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Shescape before 2.1.15 (and 3.0.0 before 3.0.2) fails to properly escape tilde (~) characters in assignment contexts on Unix systems where the shell is explicitly configured to "sh" or true and /bin/sh points to BusyBox. Using the escape and escapeAll APIs with untrusted input in an assignment prefixed to a command, an attacker can inject a tilde payload to disclose the user's home directory location and, depending on usage, alter the location on which a command operates.

CVSS v3
4.8
EG Score
4.8MEDIUMmedium confidence
EG Risk
37
EG Risk 37/100CISA 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
Severity48% × 45%
Exploitation0% × 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
0.4%
EPSS %ILE
26th
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

August 15, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Aug 15, 2026
Patch available. Sources: github, github_commit.
generic

Shescape before 2.1.15 Home Directory Disclosure via BusyBox | Advisories | VulnCheck

https://www.vulncheck.com/advisories/shescape-before-home-directory-disclosure-via-busybox
github_commit Patch Available

commit 7cba30594c16 (ericcornelissen/shescape)

Patch available: ericcornelissen/shescape v2.1.15 (contains commit 7cba30594c16)

https://github.com/ericcornelissen/shescape/commit/7cba30594c16a21524706efe2f6c6c9d8923f411
github_commit Patch Available

commit d86bf2ae2296 (ericcornelissen/shescape)

Patch available: ericcornelissen/shescape v3.0.2 (contains commit d86bf2ae2296)

https://github.com/ericcornelissen/shescape/commit/d86bf2ae22961c73458bddf70dd06adf9dadb36c
github Patch Available

Home-directory disclosure in assignment context on Unix with BusyBox · Advisory · ericcornelissen/shescape · GitHub

https://github.com/ericcornelissen/shescape/security/advisories/GHSA-j44h-fqhh-fh28

Vendor Advisories for CVE-2026-73055(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 63× 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 126 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 21:54 UTCGHSA enrichment
  3. 2026-10-03 19:27 UTCEG score recompute
  4. 2026-10-03 19:27 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 01:58 UTCEG score recompute
  7. 2026-10-02 01:58 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-09-30 20:54 UTCEG score recompute
  10. 2026-09-30 20:54 UTCGHSA enrichment
  11. 2026-09-29 15:24 UTCEPSS rescore
  12. 2026-09-28 13:52 UTCEPSS rescore
  13. 2026-09-28 10:47 UTCEG score recompute
  14. 2026-09-28 10:47 UTCGHSA enrichment
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-27 08:23 UTCEG score recompute
  17. 2026-09-27 08:23 UTCGHSA enrichment
  18. 2026-09-26 15:59 UTCEPSS rescore
  19. 2026-09-25 02:22 UTCEG score recompute
  20. 2026-09-25 02:22 UTCGHSA enrichment
  21. 2026-09-23 17:54 UTCEPSS rescore
  22. 2026-09-23 16:43 UTCEG score recompute
  23. 2026-09-23 16:42 UTCGHSA enrichment
  24. 2026-09-22 14:25 UTCEG score recompute
  25. 2026-09-22 14:25 UTCGHSA enrichment
Show 75 more
  1. 2026-09-21 21:09 UTCEPSS rescore
  2. 2026-09-21 12:07 UTCEG score recompute
  3. 2026-09-21 12:07 UTCGHSA enrichment
  4. 2026-09-20 20:16 UTCEPSS rescore
  5. 2026-09-20 09:50 UTCEG score recompute
  6. 2026-09-20 09:50 UTCGHSA enrichment
  7. 2026-09-19 03:56 UTCEG score recompute
  8. 2026-09-19 03:56 UTCGHSA enrichment
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 01:39 UTCEG score recompute
  11. 2026-09-18 01:39 UTCGHSA enrichment
  12. 2026-09-16 23:22 UTCEG score recompute
  13. 2026-09-16 23:22 UTCGHSA enrichment
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 19:18 UTCEG score recompute
  17. 2026-09-15 19:18 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-14 16:09 UTCEG score recompute
  20. 2026-09-14 16:09 UTCGHSA enrichment
  21. 2026-09-13 13:52 UTCEG score recompute
  22. 2026-09-13 13:52 UTCGHSA enrichment
  23. 2026-09-12 15:02 UTCEPSS rescore
  24. 2026-09-12 11:35 UTCEG score recompute
  25. 2026-09-12 11:35 UTCGHSA enrichment
  26. 2026-09-11 14:53 UTCEPSS rescore
  27. 2026-09-11 08:28 UTCEG score recompute
  28. 2026-09-11 08:27 UTCGHSA enrichment
  29. 2026-09-10 09:35 UTCEPSS rescore
  30. 2026-09-10 06:10 UTCGHSA enrichment
  31. 2026-09-09 03:49 UTCEG score recompute
  32. 2026-09-09 03:49 UTCGHSA enrichment
  33. 2026-09-08 22:01 UTCEPSS rescore
  34. 2026-09-07 16:13 UTCEG score recompute
  35. 2026-09-07 16:13 UTCGHSA enrichment
  36. 2026-09-06 13:48 UTCEPSS rescore
  37. 2026-09-06 05:20 UTCEG score recompute
  38. 2026-09-06 05:20 UTCGHSA enrichment
  39. 2026-09-05 03:01 UTCEG score recompute
  40. 2026-09-05 03:00 UTCGHSA enrichment
  41. 2026-09-04 05:07 UTCEPSS rescore
  42. 2026-09-04 00:40 UTCGHSA enrichment
  43. 2026-09-02 22:20 UTCEG score recompute
  44. 2026-09-02 22:19 UTCGHSA enrichment
  45. 2026-09-02 14:12 UTCEPSS rescore
  46. 2026-09-01 18:09 UTCEG score recompute
  47. 2026-09-01 18:09 UTCGHSA enrichment
  48. 2026-09-01 13:54 UTCEPSS rescore
  49. 2026-09-01 04:40 UTCEPSS rescore
  50. 2026-09-01 04:40 UTCEPSS rescore
  51. 2026-08-31 15:36 UTCEG score recompute
  52. 2026-08-31 15:36 UTCGHSA enrichment
  53. 2026-08-31 14:28 UTCEG score recompute
  54. 2026-08-31 14:28 UTCGHSA enrichment
  55. 2026-08-31 14:24 UTCMITRE cvelistV5CVSS v4 → 6.3
  56. 2026-08-31 11:32 UTCEG score recompute
  57. 2026-08-31 11:32 UTCGHSA enrichment
  58. 2026-08-30 19:18 UTCEPSS rescore
  59. 2026-08-30 19:17 UTCEPSS rescore
  60. 2026-08-30 08:09 UTCEG score recompute
  61. 2026-08-30 08:09 UTCGHSA enrichment
  62. 2026-08-30 01:22 UTCEPSS rescore
  63. 2026-08-29 05:52 UTCEG score recompute
  64. 2026-08-29 05:52 UTCGHSA enrichment
  65. 2026-08-28 21:42 UTCEPSS rescore
  66. 2026-08-27 19:31 UTCEG score recompute
  67. 2026-08-27 19:31 UTCGHSA enrichment
  68. 2026-08-27 14:25 UTCEPSS rescore
  69. 2026-08-26 17:14 UTCEG score recompute
  70. 2026-08-26 17:14 UTCGHSA enrichment
  71. 2026-08-26 14:47 UTCEPSS rescore
  72. 2026-08-26 10:44 UTCGHSA enrichment
  73. 2026-08-25 08:26 UTCEG score recompute
  74. 2026-08-25 08:26 UTCGHSA enrichment
  75. 2026-08-24 06:09 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-73055?
CVE-2026-73055 is a medium vulnerability published on August 15, 2026. Shescape before 2.1.15 (and 3.0.0 before 3.0.2) fails to properly escape tilde (~) characters in assignment contexts on Unix systems where the shell is explicitly configured to "sh" or true and /bin/sh points to BusyBox. Using the escape and escapeAll APIs with untrusted input in an assignment…
When was CVE-2026-73055 disclosed?
CVE-2026-73055 was first published on August 15, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73055 actively exploited?
CVE-2026-73055 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73055?
CVE-2026-73055 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73055?
A fix for CVE-2026-73055 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73055 are linked in the Vendor Advisories panel on this page.

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