CVE-2025-47285

LOWNVD 2.92.9—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 2.9 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% 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
2.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 2.9Exploit: None knownExposed services: Not assessed

A fixed version is listed under Patch Availability — apply it.

Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine. In versions up to and including 0.4.2rc1, concat() may skip evaluation of side effects when the length of an argument is zero. This is due to a fastpath in the implementation which skips evaluation of argument expressions when their length is zero. In practice, it would be very unusual in user code to construct zero-length bytestrings using an expression with side-effects, since zero-length bytestrings are typically constructed with the empty literal b""; the only way to construct an empty bytestring which has side effects would be with the ternary operator introduced in v0.3.8, e.g. b"" if self.do_some_side_effect() else b"". The fix is available in pull request 4644 and expected to be part of the 0.4.2 release. As a workaround, don't have side effects in expressions which construct zero-length bytestrings.

CVSS v3
2.9
EG Score
2.9LOWmedium confidence
EG Risk
13
EG Risk 13/100

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
Severity29% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

Published

May 15, 2025

Last Modified

April 15, 2026

References (3)

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
pipvyper—ghsa

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.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
vyper0.1.0b1 ... 0.4.2rc1 (71 versions)
  • every version through 0.4.2rc1: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 211 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2025-47285?
CVE-2025-47285 is a low vulnerability published on May 15, 2025. Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine. In versions up to and including 0.4.2rc1, concat() may skip evaluation of side effects when the length of an argument is zero. This is due to a fastpath in the implementation which skips evaluation of argument expressions…
When was CVE-2025-47285 disclosed?
CVE-2025-47285 was first published on May 15, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-47285 actively exploited?
CVE-2025-47285 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-47285?
CVE-2025-47285 has a CVSS v3 base score of 2.9 (NVD).
How do I remediate CVE-2025-47285?
A fixed version for CVE-2025-47285 is listed under Patch Availability on this page: update to the version listed for your package.

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