CVE-2026-39246

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-10. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Elevated
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

decompress before 4.2.2 allows arbitrary symlink creation during archive extraction. When processing symlink entries (type === 'symlink'), the x.linkname field from the archive is passed directly to fs.symlink() without validation (index.js line 121). The preventWritingThroughSymlink check on line 98 only applies to file entries, not symlink creation. An attacker can craft an archive with symlink entries pointing to sensitive files outside the extraction directory (e.g., /etc/passwd), enabling information disclosure when the application reads the extracted contents.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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 (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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
0.7%
EPSS %ILE
50th
KEV
Not listed

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 public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

July 9, 2026

Last Modified

July 13, 2026

Advisory Details (2)

Auto-updated Jul 10, 2026
Patch available.
Web page

[CVE-2026-39246] Arbitrary symlink creation during extraction → information disclosure · Issue #114 · kevva/decompress · GitHub

https://github.com/kevva/decompress/issues/114
Web page

GitHub - kevva/decompress: Extracting archives made easy · GitHub

https://github.com/kevva/decompress

Vendor Advisories for CVE-2026-39246(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatdotnet8-0-main-8.0.128-1.1.hum12026-07-10redhat

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.

Weakness Classification(1)

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

All Vendor Advisories

(1)

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 / 37× 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 99 of 236 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 137 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  3. 2026-10-12 16:10 UTCEG score recompute
  4. 2026-10-11 19:52 UTCEG score recompute
  5. 2026-10-11 17:06 UTCEG score recompute
  6. 2026-10-11 14:32 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  17. 2026-10-01 16:06 UTCEG score recompute
  18. 2026-10-01 16:06 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  21. 2026-09-28 11:08 UTCEG score recompute
  22. 2026-09-28 11:08 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  24. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.7% · 49th percentile
Show 74 more
  1. 2026-09-24 11:43 UTCEG score recompute
  2. 2026-09-24 11:43 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-09-23 06:02 UTCEG score recompute
  4. 2026-09-23 06:02 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-09-18 05:39 UTCEG score recompute
  8. 2026-09-18 05:39 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  11. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  12. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  13. 2026-09-14 11:13 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-09-13 23:47 UTCEG score recompute
  15. 2026-09-13 23:47 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  17. 2026-09-13 08:21 UTCEG score recompute
  18. 2026-09-13 08:21 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  20. 2026-09-12 14:44 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-09-12 03:28 UTCEG score recompute
  22. 2026-09-12 03:28 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  24. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  26. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  27. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  28. 2026-09-06 14:00 UTCEG score recompute
  29. 2026-09-06 14:00 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  30. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  31. 2026-09-05 22:38 UTCEG score recompute
  32. 2026-09-05 22:38 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  35. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  36. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  38. 2026-08-30 18:13 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-08-30 06:59 UTCEG score recompute
  40. 2026-08-30 06:59 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  41. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  42. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  43. 2026-08-27 21:47 UTCEG score recompute
  44. 2026-08-27 21:47 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  46. 2026-08-27 01:14 UTCEG score recompute
  47. 2026-08-27 01:14 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  48. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  49. 2026-08-26 03:59 UTCEG score recompute
  50. 2026-08-26 03:59 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  51. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  52. 2026-08-25 11:15 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-08-24 23:51 UTCEG score recompute
  54. 2026-08-24 23:51 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-08-24 12:37 UTCEG score recompute
  56. 2026-08-24 12:37 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-08-24 00:40 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  58. 2026-08-23 13:26 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-08-23 02:12 UTCEG score recompute
  60. 2026-08-23 02:12 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  61. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  62. 2026-08-22 14:57 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-08-22 03:42 UTCEG score recompute
  64. 2026-08-22 03:42 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  65. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  66. 2026-08-21 15:08 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-08-21 03:53 UTCEG score recompute
  68. 2026-08-21 03:53 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  70. 2026-08-20 15:20 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-08-20 01:53 UTCEG score recompute
  72. 2026-08-20 01:53 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  74. 2026-08-19 09:47 UTCGHSA enrichmentGHSA-m5fg-qjq5-56fv · GitHub severity HIGH · GitHub CVSS 7.5

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-39246?
CVE-2026-39246 is a high-severity vulnerability; its CVE record was published on July 9, 2026. decompress before 4.2.2 allows arbitrary symlink creation during archive extraction. When processing symlink entries (type === 'symlink'), the x.linkname field from the archive is passed directly to fs.symlink() without validation (index.js line 121). The preventWritingThroughSymlink check on line…
When was the CVE record for CVE-2026-39246 published?
The CVE record for CVE-2026-39246 was published on July 9, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 13, 2026; the record at its source may have been updated since.
Is CVE-2026-39246 actively exploited?
CVE-2026-39246 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-39246?
CVE-2026-39246 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-39246?
A fix for CVE-2026-39246 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-39246 are linked in the Vendor Advisories panel on this page.

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