CVE-2026-22702

MEDIUMNVD 4.54.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 100% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.5Exploit: None knownExposed: 0

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

virtualenv is a tool for creating isolated virtual python environments. Prior to version 20.36.1, TOCTOU (Time-of-Check-Time-of-Use) vulnerabilities in virtualenv allow local attackers to perform symlink-based attacks on directory creation operations. An attacker with local access can exploit a race condition between directory existence checks and creation to redirect virtualenv's app_data and lock file operations to attacker-controlled locations. This issue has been patched in version 20.36.1.

CVSS v3
4.5
EG Score
4.5(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity45% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

January 10, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 9, 2026
Patch available. Sources: github_commit, github_pr, github.
github Patch Available

TOCTOU Vulnerabilities in Directory Creation · Advisory · pypa/virtualenv · GitHub

https://github.com/pypa/virtualenv/security/advisories/GHSA-597g-3phw-6986
github_pr Patch Available

fix: resolve TOCTOU vulnerabilities in app_data and lock directory creation

Patch available: pypa/virtualenv 20.38.0 (PR #3013 merged 2026-01-09)

https://github.com/pypa/virtualenv/pull/3013
github_commit Patch Available

commit dec4cec5d16e (pypa/virtualenv)

Patch available: pypa/virtualenv 20.38.0 (contains commit dec4cec5d16e)

https://github.com/pypa/virtualenv/commit/dec4cec5d16edaf83a00a658f32d1e032661cebc

Vendor Advisories for CVE-2026-22702(1)

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

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python-virtualenv20.10.0+ds-1 ... 21.5.1+ds-1 (51 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-virtualenv20.17.1+ds-1 ... 21.5.1+ds-1 (33 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-virtualenv20.31.2+ds-120.31.2+ds-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-virtualenv20.31.2+ds-1, 20.33.1+ds-1, 20.34.0+ds-1, 20.35.3+ds-1, 20.35.4+ds-120.36.1+ds-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
virtualenv0.8 ... 20.9.0 (245 versions)20.36.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 20× 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 124 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-22702?
CVE-2026-22702 is a medium vulnerability published on January 10, 2026. virtualenv is a tool for creating isolated virtual python environments. Prior to version 20.36.1, TOCTOU (Time-of-Check-Time-of-Use) vulnerabilities in virtualenv allow local attackers to perform symlink-based attacks on directory creation operations. An attacker with local access can exploit a…
When was CVE-2026-22702 disclosed?
CVE-2026-22702 was first published in the National Vulnerability Database on January 10, 2026, 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-2026-22702 actively exploited?
CVE-2026-22702 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 99.1% of all scored CVEs.
What is the CVSS score of CVE-2026-22702?
CVE-2026-22702 has a CVSS v3 base score of 4.5 (NVD).
How do I remediate CVE-2026-22702?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22702, 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.

Dependency Blast Radius

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