CVE-2025-47285

LOWNVD 2.92.9—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 2.9 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 66% 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
2.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 2.9Exploit: NoneExposed: 0

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

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
2.9(medium)
EPSS
29.2%
KEV
Not listed

Published

May 15, 2025

Last Modified

April 15, 2026

References (3)

Patch Availability(1)

Vendor / EcosystemFixed in / 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 rangeFixed inDependents
vyper0.1.0b1 ... 0.4.2rc1 (71 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 46× 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 109 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-09 19:09 UTCEPSS rescore
  4. 2026-07-09 19:09 UTCEPSS rescore
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  21. 2026-06-27 03:08 UTCEPSS rescore
  22. 2026-06-26 05:46 UTCOSV refresh
  23. 2026-06-25 13:49 UTCEPSS rescore
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-24 14:04 UTCEPSS rescore
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  1. 2026-06-24 14:04 UTCEPSS rescore
  2. 2026-06-23 21:32 UTCEPSS rescore
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  4. 2026-06-22 14:25 UTCEPSS rescore
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  10. 2026-06-19 19:25 UTCEPSS rescore
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  24. 2026-06-10 22:18 UTCEPSS rescore
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  26. 2026-06-10 13:22 UTCEPSS rescore
  27. 2026-06-08 16:14 UTCEG score recompute▲ 2.90
  28. 2026-06-08 16:14 UTCGHSA enrichment
  29. 2026-06-08 14:16 UTCEPSS rescore
  30. 2026-06-08 14:16 UTCEPSS rescore
  31. 2026-06-07 15:24 UTCEPSS rescore
  32. 2026-06-06 13:47 UTCEPSS rescore
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  38. 2026-06-04 13:12 UTCEPSS rescore
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  40. 2026-06-03 07:40 UTCOSV refresh
  41. 2026-06-02 20:12 UTCEPSS rescore
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  43. 2026-06-01 13:51 UTCEPSS rescore
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  45. 2026-05-31 22:30 UTCEPSS rescore
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  66. 2026-05-24 16:57 UTCEPSS rescore
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  68. 2026-05-22 21:16 UTCEPSS rescore
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  71. 2026-05-21 22:43 UTCEPSS rescore
  72. 2026-05-21 22:43 UTCEPSS rescore
  73. 2026-05-21 13:45 UTCEG score recompute
  74. 2026-05-21 13:45 UTCGHSA enrichment
  75. 2026-05-20 22:37 UTCEPSS rescore

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 in the National Vulnerability Database 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 29.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-47285, 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.

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