HOMEVULNERABILITIESCVE-2023-30629
HIGH

CVE-2023-30629

CWE-670Published: April 24, 2023· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions 0.3.1 through 0.3.7, the Vyper compiler generates the wrong bytecode. Any contract that uses the `raw_call` with `revert_on_failure=False` and `max_outsize=0` receives the wrong response from `raw_call`. Depending on the memory garbage, the result can be either `True` or `False`. A patch is available and, as of time of publication, anticipated to be part of Vyper 0.3.8. As a workaround, one may always put `max_outsize>0`.

NVD Source

Technical Analysis

CVE-2023-30629 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

vyperlang1 product(s)
vyper
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/lidofinance/gate-seals/pull/5/files
PATCHhttps://github.com/vyperlang/vyper/commit/851f7a1b3aa2a36fd041e3d0ed38f9355a58c8ae
PATCHhttps://github.com/lidofinance/gate-seals/pull/5/files
PATCHhttps://github.com/vyperlang/vyper/commit/851f7a1b3aa2a36fd041e3d0ed38f9355a58c8ae
ADVISORYhttps://github.com/vyperlang/vyper/security/advisories/GHSA-w9g2-3w7p-72g9
ADVISORYhttps://github.com/vyperlang/vyper/security/advisories/GHSA-w9g2-3w7p-72g9

All References (10)

→
https://docs.vyperlang.org/en/v0.3.7/built-in-functions.html#raw_callProduct
→
https://github.com/lidofinance/gate-seals/blob/051593e74df01a4131c485b4fda52e691cd4b7d8/contracts/GateSeal.vy#L164Product
→
https://github.com/lidofinance/gate-seals/pull/5/filesPatch
→
https://github.com/vyperlang/vyper/commit/851f7a1b3aa2a36fd041e3d0ed38f9355a58c8aePatch
→
https://github.com/vyperlang/vyper/security/advisories/GHSA-w9g2-3w7p-72g9Exploit · Vendor Advisory
→
https://docs.vyperlang.org/en/v0.3.7/built-in-functions.html#raw_callProduct
→
https://github.com/lidofinance/gate-seals/blob/051593e74df01a4131c485b4fda52e691cd4b7d8/contracts/GateSeal.vy#L164Product
→
https://github.com/lidofinance/gate-seals/pull/5/filesPatch
→
https://github.com/vyperlang/vyper/commit/851f7a1b3aa2a36fd041e3d0ed38f9355a58c8aePatch
→
https://github.com/vyperlang/vyper/security/advisories/GHSA-w9g2-3w7p-72g9Exploit · Vendor Advisory

Quick Facts

CVE IDCVE-2023-30629
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-670
CISA KEVNo
Affected1 vendor(s)
PublishedApr 24, 2023

Related CVEs (CWE-670)

CVE-2020-1914
9.8
CVE-2025-43359
9.8
CVE-2019-17192
9.8
CVE-2022-25745
9.8
CVE-2022-21679
9.8
CVE-2020-17466
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-30629 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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