CVE-2026-73055

MEDIUMPre-NVD 4.84.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-59804 (ENISA EUVD) · GHSA-jfpg-hfv5-2rf7 (GitHub Security Advisories)Source: ENISA EUVD

4.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • 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 37/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity48% × 45%
Impact severity (EG Severity): CVSS 4.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
29th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.8): severity, escalated by confirmed exploitation. This CVE's 4.8 is its impact severity (EG Severity), not escalated.

EG Severity
4.8 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 15, 2026

Last Modified

August 31, 2026

Advisory Details (4)

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

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 advisoryMentions a patch (unverified)

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 8× in last 7d / 44× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 165 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 65 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-30 06:55 UTCOSV refresh
  5. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-10-25 14:06 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-22 19:20 UTCEG score recompute
  14. 2026-10-22 19:20 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  18. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  19. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  20. 2026-10-18 03:15 UTCEG score recompute
  21. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  22. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  24. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  25. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
Show 75 more
  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-10-12 15:41 UTCEG score recompute
  3. 2026-10-11 19:26 UTCEG score recompute
  4. 2026-10-11 16:42 UTCEG score recompute
  5. 2026-10-11 14:02 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  9. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-06 09:07 UTCEG score recompute
  13. 2026-10-06 09:07 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  16. 2026-10-04 21:54 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  17. 2026-10-03 19:27 UTCEG score recompute
  18. 2026-10-03 19:27 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  19. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  20. 2026-10-02 01:58 UTCEG score recompute
  21. 2026-10-02 01:58 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  23. 2026-09-30 20:54 UTCEG score recompute
  24. 2026-09-30 20:54 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  25. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  26. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  27. 2026-09-28 10:47 UTCEG score recompute
  28. 2026-09-28 10:47 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  29. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  30. 2026-09-27 08:23 UTCEG score recompute
  31. 2026-09-27 08:23 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  32. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  33. 2026-09-25 02:22 UTCEG score recompute
  34. 2026-09-25 02:22 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  35. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  36. 2026-09-23 16:43 UTCEG score recompute
  37. 2026-09-23 16:42 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  38. 2026-09-22 14:25 UTCEG score recompute
  39. 2026-09-22 14:25 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  40. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  41. 2026-09-21 12:07 UTCEG score recompute
  42. 2026-09-21 12:07 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  43. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  44. 2026-09-20 09:50 UTCEG score recompute
  45. 2026-09-20 09:50 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  46. 2026-09-19 03:56 UTCEG score recompute
  47. 2026-09-19 03:56 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  48. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  49. 2026-09-18 01:39 UTCEG score recompute
  50. 2026-09-18 01:39 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  51. 2026-09-16 23:22 UTCEG score recompute
  52. 2026-09-16 23:22 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  53. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  54. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  55. 2026-09-15 19:18 UTCEG score recompute
  56. 2026-09-15 19:18 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  57. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  58. 2026-09-14 16:09 UTCEG score recompute
  59. 2026-09-14 16:09 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  60. 2026-09-13 13:52 UTCEG score recompute
  61. 2026-09-13 13:52 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  62. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  63. 2026-09-12 11:35 UTCEG score recompute
  64. 2026-09-12 11:35 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  65. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  66. 2026-09-11 08:28 UTCEG score recompute
  67. 2026-09-11 08:27 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  68. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  69. 2026-09-10 06:10 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  70. 2026-09-09 03:49 UTCEG score recompute
  71. 2026-09-09 03:49 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  72. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  73. 2026-09-07 16:13 UTCEG score recompute
  74. 2026-09-07 16:13 UTCGHSA enrichmentGHSA-jfpg-hfv5-2rf7 · GitHub severity CRITICAL · GitHub CVSS 4.8
  75. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile

Frequently asked(5)

What is CVE-2026-73055?
CVE-2026-73055 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2026-73055 was made public on August 1, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 15, 2026. EchelonGraph's copy of the record carries a last-modified date of August 31, 2026; the record at its source may have been updated since.
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 (29th 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-73055

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