CVE-2023-49797

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.3% (23rd percentile of EPSS-scored CVEs). 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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

PyInstaller bundles a Python application and all its dependencies into a single package. A PyInstaller built application, elevated as a privileged process, may be tricked by an unprivileged attacker into deleting files the unprivileged user does not otherwise have access to. A user is affected if all the following are satisfied: 1. The user runs an application containing either matplotlib or win32com. 2. The application is ran as administrator (or at least a user with higher privileges than the attacker). 3. The user's temporary directory is not locked to that specific user (most likely due to TMP/TEMP environment variables pointing to an unprotected, arbitrary, non default location). Either: A. The attacker is able to very carefully time the replacement of a temporary file with a symlink. This switch must occur exactly between shutil.rmtree()'s builtin symlink check and the deletion itself B: The application was built with Python 3.7.x or earlier which has no protection against Directory Junctions links. The vulnerability has been addressed in PR #7827 which corresponds to pyinstaller >= 5.13.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or 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
0.3%
EPSS %ILE
23rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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

December 9, 2023

Last Modified

June 17, 2026

References (10)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pyinstaller1.5 ... 5.9.0 (45 versions)
  • every version up to 5.13.1: fixed in 5.13.1
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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 186 total refreshes for this CVE.

  1. 2026-10-09 20:05 UTCEPSS rescore
  2. 2026-10-08 17:06 UTCEPSS rescore
  3. 2026-10-07 23:46 UTCEPSS rescore
  4. 2026-10-06 15:15 UTCEPSS rescore
  5. 2026-10-05 17:41 UTCEPSS rescore
  6. 2026-10-04 23:20 UTCEPSS rescore
  7. 2026-10-03 14:23 UTCEPSS rescore
  8. 2026-10-01 19:48 UTCEPSS rescore
  9. 2026-09-30 16:34 UTCEG score recompute
  10. 2026-09-30 15:01 UTCEPSS rescore
  11. 2026-09-29 15:17 UTCEPSS rescore
  12. 2026-09-28 13:49 UTCEPSS rescore
  13. 2026-09-27 13:42 UTCEPSS rescore
  14. 2026-09-26 00:22 UTCEPSS rescore
  15. 2026-09-24 14:01 UTCEPSS rescore
  16. 2026-09-24 14:01 UTCEPSS rescore
  17. 2026-09-23 13:46 UTCEPSS rescore
  18. 2026-09-22 14:46 UTCEPSS rescore
  19. 2026-09-22 14:16 UTCOSV refresh
  20. 2026-09-21 20:31 UTCEPSS rescore
  21. 2026-09-20 20:14 UTCEPSS rescore
  22. 2026-09-20 20:14 UTCEPSS rescore
  23. 2026-09-18 19:26 UTCEPSS rescore
  24. 2026-09-17 19:25 UTCEPSS rescore
  25. 2026-09-16 14:06 UTCEPSS rescore
Show 75 more
  1. 2026-09-16 05:11 UTCEPSS rescore
  2. 2026-09-15 03:08 UTCEPSS rescore
  3. 2026-09-13 16:44 UTCEPSS rescore
  4. 2026-09-12 14:58 UTCEPSS rescore
  5. 2026-09-11 14:50 UTCEPSS rescore
  6. 2026-09-11 09:34 UTCEPSS rescore
  7. 2026-09-08 21:58 UTCEPSS rescore
  8. 2026-09-07 15:59 UTCEPSS rescore
  9. 2026-09-06 13:46 UTCEPSS rescore
  10. 2026-09-06 13:45 UTCEPSS rescore
  11. 2026-09-05 15:26 UTCEPSS rescore
  12. 2026-09-04 13:58 UTCEPSS rescore
  13. 2026-09-04 05:04 UTCEPSS rescore
  14. 2026-09-03 11:00 UTCOSV refresh
  15. 2026-09-02 14:10 UTCEPSS rescore
  16. 2026-09-02 14:09 UTCEPSS rescore
  17. 2026-09-01 13:51 UTCEPSS rescore
  18. 2026-09-01 04:35 UTCEPSS rescore
  19. 2026-08-30 19:15 UTCEPSS rescore
  20. 2026-08-30 01:20 UTCEPSS rescore
  21. 2026-08-27 14:23 UTCEPSS rescore
  22. 2026-08-26 14:44 UTCEPSS rescore
  23. 2026-08-25 13:46 UTCEPSS rescore
  24. 2026-08-24 14:14 UTCEPSS rescore
  25. 2026-08-23 00:17 UTCEPSS rescore
  26. 2026-08-21 23:47 UTCEPSS rescore
  27. 2026-08-20 22:53 UTCEPSS rescore
  28. 2026-08-19 17:02 UTCEPSS rescore
  29. 2026-08-19 17:02 UTCEPSS rescore
  30. 2026-08-18 13:46 UTCEPSS rescore
  31. 2026-08-17 13:45 UTCEPSS rescore
  32. 2026-08-17 00:21 UTCOSV refresh
  33. 2026-08-16 14:54 UTCEPSS rescore
  34. 2026-08-16 02:12 UTCEPSS rescore
  35. 2026-08-15 01:28 UTCEPSS rescore
  36. 2026-08-13 21:58 UTCEPSS rescore
  37. 2026-08-12 13:49 UTCEPSS rescore
  38. 2026-08-11 13:40 UTCEPSS rescore
  39. 2026-08-10 23:57 UTCEPSS rescore
  40. 2026-08-09 13:44 UTCEPSS rescore
  41. 2026-08-09 13:44 UTCEPSS rescore
  42. 2026-08-08 16:35 UTCEPSS rescore
  43. 2026-08-07 16:25 UTCEPSS rescore
  44. 2026-08-06 13:45 UTCEPSS rescore
  45. 2026-08-05 19:15 UTCEPSS rescore
  46. 2026-08-04 15:07 UTCEPSS rescore
  47. 2026-08-04 10:35 UTCEPSS rescore
  48. 2026-08-03 10:34 UTCEPSS rescore
  49. 2026-08-03 10:34 UTCEPSS rescore
  50. 2026-08-02 02:25 UTCEPSS rescore
  51. 2026-08-02 02:25 UTCEPSS rescore
  52. 2026-08-01 18:36 UTCOSV refresh
  53. 2026-08-01 04:14 UTCEPSS rescore
  54. 2026-07-30 16:26 UTCEPSS rescore
  55. 2026-07-30 16:26 UTCEPSS rescore
  56. 2026-07-30 01:28 UTCEPSS rescore
  57. 2026-07-28 15:34 UTCEPSS rescore
  58. 2026-07-28 15:34 UTCEPSS rescore
  59. 2026-07-27 14:10 UTCEPSS rescore
  60. 2026-07-26 14:52 UTCEPSS rescore
  61. 2026-07-25 14:16 UTCEPSS rescore
  62. 2026-07-24 14:16 UTCEPSS rescore
  63. 2026-07-24 14:16 UTCEPSS rescore
  64. 2026-07-23 14:16 UTCEPSS rescore
  65. 2026-07-23 02:28 UTCEG score recompute
  66. 2026-07-22 23:15 UTCEG score recompute▼ 1.00
  67. 2026-07-22 14:06 UTCEPSS rescore
  68. 2026-07-20 17:06 UTCEPSS rescore
  69. 2026-07-19 14:29 UTCEPSS rescore
  70. 2026-07-19 14:29 UTCEPSS rescore
  71. 2026-07-19 02:27 UTCEPSS rescore
  72. 2026-07-18 10:03 UTCEPSS rescore
  73. 2026-07-18 10:03 UTCEPSS rescore
  74. 2026-07-16 17:01 UTCEPSS rescore
  75. 2026-07-15 16:56 UTCEPSS rescore

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PyPI:pyinstaller

Frequently asked(5)

What is CVE-2023-49797?
CVE-2023-49797 is a high vulnerability published on December 9, 2023. PyInstaller bundles a Python application and all its dependencies into a single package. A PyInstaller built application, elevated as a privileged process, may be tricked by an unprivileged attacker into deleting files the unprivileged user does not otherwise have access to. A user is affected if…
When was CVE-2023-49797 disclosed?
CVE-2023-49797 was first published on December 9, 2023, 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-2023-49797 actively exploited?
CVE-2023-49797 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-49797?
CVE-2023-49797 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-49797?
A fix for CVE-2023-49797 is available: update to the fixed version the vendor names in its advisory.

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