CVE-2023-42441

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 65% 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Starting in version 0.2.9 and prior to version 0.3.10, locks of the type @nonreentrant("") or @nonreentrant('') do not produce reentrancy checks at runtime. This issue is fixed in version 0.3.10. As a workaround, ensure the lock name is a non-empty string.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

September 18, 2023

Last Modified

June 17, 2026

References (6)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
vyper0.2.10 ... 0.3.9 (23 versions)0.3.10—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 43× 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 111 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2023-42441?
CVE-2023-42441 is a medium vulnerability published on September 18, 2023. Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Starting in version 0.2.9 and prior to version 0.3.10, locks of the type @nonreentrant("") or @nonreentrant('') do not produce reentrancy checks at runtime. This issue is fixed in version 0.3.10. As a workaround,…
When was CVE-2023-42441 disclosed?
CVE-2023-42441 was first published in the National Vulnerability Database on September 18, 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-2023-42441 actively exploited?
CVE-2023-42441 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 65.3% of all scored CVEs.
What is the CVSS score of CVE-2023-42441?
CVE-2023-42441 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2023-42441?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-42441, 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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