CVE-2025-47774

LOWNVD 2.92.9—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 2.9 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 67% 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: 0.5%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, the slice() builtin can elide side effects when the output length is 0, and the source bytestring is a builtin (msg.data or .code). The reason is that for these source locations, the check that length >= 1 is skipped. The result is that a 0-length bytestring constructed with slice can be passed to make_byte_array_copier, which elides evaluation of its source argument when the max length is 0. The impact is that side effects in the start argument may be elided when the length argument is 0, e.g. slice(msg.data, self.do_side_effect(), 0). The fix in pull request 4645 disallows any invocation of slice() with length 0, including for the ad hoc locations discussed in this advisory. The fix is expected to be part of version 0.4.2.

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
0.5%
EPSS %ILE
37th
KEV
Not listed

Published

May 15, 2025

Last Modified

April 15, 2026

References (4)

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 209 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 09:19 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 07:14 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 07:10 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 02:57 UTCEG score recompute
  57. 2026-07-22 14:07 UTCEPSS rescore
  58. 2026-07-22 14:07 UTCEPSS rescore
  59. 2026-07-21 15:24 UTCEPSS rescore
  60. 2026-07-20 17:07 UTCEPSS rescore
  61. 2026-07-19 14:30 UTCEPSS rescore
  62. 2026-07-19 14:30 UTCEPSS rescore
  63. 2026-07-19 02:28 UTCEPSS rescore
  64. 2026-07-19 02:28 UTCEPSS rescore
  65. 2026-07-18 10:04 UTCEPSS rescore
  66. 2026-07-16 17:02 UTCEPSS rescore
  67. 2026-07-16 17:02 UTCEPSS rescore
  68. 2026-07-15 16:57 UTCEPSS rescore
  69. 2026-07-15 16:57 UTCEPSS rescore
  70. 2026-07-15 01:59 UTCEPSS rescore
  71. 2026-07-15 01:59 UTCEPSS rescore
  72. 2026-07-14 07:55 UTCOSV refresh
  73. 2026-07-13 22:29 UTCEPSS rescore
  74. 2026-07-13 22:29 UTCEPSS rescore
  75. 2026-07-13 06:12 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-47774?
CVE-2025-47774 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, the slice() builtin can elide side effects when the output length is 0, and the source bytestring is a builtin (msg.data or <address>.code). The reason is that for these source…
When was CVE-2025-47774 disclosed?
CVE-2025-47774 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-2025-47774 actively exploited?
CVE-2025-47774 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-47774?
CVE-2025-47774 has a CVSS v3 base score of 2.9 (NVD).
How do I remediate CVE-2025-47774?
A fixed version for CVE-2025-47774 is listed under Patch Availability on this page: update to the version listed for your package.

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