Vyper SHA3 code generation bug
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-327.
Summary
Vyper is a Pythonic Smart Contract Language for the EVM. There is an error in the stack management when compiling the `IR` for `sha3_64`. Concretely, the `height` variable is miscalculated. The vulnerability can't be triggered without writing the `IR` by hand (that is, it cannot be triggered from regular vyper code). `sha3_64` is used for retrieval in mappings. No flow that would cache the `key` was found so the issue shouldn't be possible to trigger when compiling the compiler-generated `IR`. This issue isn't triggered during normal compilation of vyper code so the impact is low. At the time of publication there is no patch available.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vyperlang | vyper | up to 0.3.10 | — | No fix listed | CNA |
| — | vyper (PyPI) | before 0.4.0 | 0.4.0 | Patch available | GHSA-6845-xw22-ffxv |
- vyper Vendorvyperlang Affected up to 0.3.10 Fixed in — No fix listed CNA
- vyper (PyPI) Vendor— Affected before 0.4.0 Fixed in 0.4.0 Patch available GHSA-6845-xw22-ffxv
Remediation
- Fix · GHSA-6845-xw22-ffxv vyper (PyPI) Fixed in 0.4.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-24559
- 2026-10-03 Alias added: GHSA-6845-xw22-ffxv
References
Advisory 2
Other 5
- https://github.com/vyperlang/vyper/blob/c150fc49ee9375a930d177044559b83cb95f7963/vyper/ir/compile_ir.py#L585-L586
- https://github.com/vyperlang/vyper/pull/4063
- https://github.com/vyperlang/vyper/commit/d9f9fdadd81a148cbc68f02dbbbcdc0c92fad652
- https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2024-147.yaml
- https://github.com/vyperlang/vyper
More vyperlang Vyper vulnerabilities
- TI-2024-16182 Vyper bounds check on built-in `slice()` function can be overflowed CVSS 3.1CRITICAL 9.8
- TI-2024-14992 concat built-in can corrupt memory in vyper CVSS 3.1CRITICAL 9.8
- TI-2024-16184 Vyper array negative index vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-08657 Integer bounds error in Vyper CVSS 3.1CRITICAL 9.8
- TI-2022-11796 Multiple evaluation of contract address in call in vyper CVSS 3.1HIGH 8.2
- TI-2024-21531 vyper performs double eval of the argument of sqrt CVSS 3.1MEDIUM 5.3
Sources
- CVE-2024-24559 · CVE Program
- CVE-2024-24559 · NVD
- FIRST EPSS
- GHSA-6845-xw22-ffxv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences