Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover (0x1) and Identity (0x4), the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall execution continue. Then the execution result can be incorrect. Based on EVM's rules, after the failed precompile the remaining code has only 1/64 of the pre-call-gas left (as 63/64 were forwarded and spent). Hence, only fairly simple executions can follow the failed precompile calls. Therefore, we found no significantly impacted real-world contracts. None the less an advisory has been made out of an abundance of caution. This issue is fixed in 0.4.1.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles
    EcRecover (0x1) and Identity (0x4), the success flag of the call is not checked. As a consequence an
    attacker can provide a specific amount of gas to make these calls fail but let the overall execution
    continue. Then the execution result can be incorrect. Based on EVM's rules, after the failed precompile
    the remaining code has only 1/64 of the pre-call-gas left (as 63/64 were forwarded and spent). Hence, only
    fairly simple executions can follow the failed precompile calls. Therefore, we found no significantly
    impacted real-world contracts. None the less an advisory has been made out of an abundance of caution.
    This issue is fixed in 0.4.1. (CVE-2025-21607)

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-c7fae57601 advisory.

    Vyper ver. 0.4.1

    ----

    Another one small fix

    ----

    Fix for a few known issues

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-77c63e7236 advisory.

    Vyper ver. 0.4.1

    ----

    Another one small fix

    ----

    Fix for a few known issues

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
446564	SCA: security update for vyper (GHSA-vgf2-gvx8-xwc3)	Tenable Cloud Security	SCA Checks	Local	low
446564	SCA: security update for vyper (GHSA-vgf2-gvx8-xwc3)	Tenable Self-Hosted Container Security	SCA Checks	Local	low
232641	Fedora 41 : vyper (2025-c7fae57601)	Nessus	Fedora Local Security Checks	Local	low
232637	Fedora 40 : vyper (2025-77c63e7236)	Nessus	Fedora Local Security Checks	Local	low

Detections

Analytics

CVE-2025-21607

low

Tenable Plugins

low

low

low

low