GHSA-2q8v-3gqq-4f8p · Severity: high · Ecosystem: pip — concat built-in can corrupt memory in vyper
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. The `concat` built-in can write over the bounds of the memory buffer that was allocated for it and thus overwrite existing valid data. The root cause is that the `build_IR` for `concat` doesn't properly adhere to the API of copy functions (for `>=0.3.2` the `copy_bytes` function). A contract search was performed and no vulnerable contracts were found in production. The buffer overflow can result in the change of semantics of the contract. The overflow is length-dependent and thus it might go unnoticed during contract testing. However, certainly not all usages of concat will result in overwritten valid data as we require it to be in an internal function and close to the return statement where other memory allocations don't occur. This issue has been addressed in 0.4.0.
Conclusion & alert: CVE-2024-22419 is rated High Exploit Risk (62.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.77%). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.54% | 0.77% | +0.23% |
| 2 | 2026-02-05 | 0.41% | 0.54% | +0.13% |
| 3 | 2025-11-21 | — | 0.41% | — |
Full EPSS history (10 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.3 | 3.1 | HIGH |
|
3.9 | 3.4 | [email protected] |
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
GHSA-2q8v-3gqq-4f8p · Severity: high · Ecosystem: pip — concat built-in can corrupt memory in vyper
| URL | Tags |
|---|---|
| https://github.com/vyperlang/vyper/commit/55e18f6d128b2da8986adbbcccf1cd59a4b9ad6f | Patch |
| https://github.com/vyperlang/vyper/issues/3737 | Exploit Issue Tracking Vendor Advisory |
| https://github.com/vyperlang/vyper/security/advisories/GHSA-2q8v-3gqq-4f8p | Exploit Vendor Advisory |