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Vulnerabilities

Security fix · CVE-2021-48018

Storage corruption due to variables overwritten by re-entrancy locks

Published Aug 5, 2021 · catalog updated Oct 24, 2026 · Storage corruption due to

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-48018. EPSS is 0.39%. Act only if a listed version of Storage corruption due to is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Storage corruption due to).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.39%
Remediation
Advisory link
Affected products
PyPI vyper

### Background When attempting to use the v0.2.14 release, @pandadefi discovered an issue using the decorator. ### Impact Reentrancy protection storage slots get allocated to the same slots as storage variables, leading to the corruption of storage variables when using the decorator. ### Patches This issue was fixed in v0.2.15 in #2391, #2379 ### Workarounds Don't use the decorator in these versions.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • PyPI vyper0.2.13 → 0.2.15

How to fix CVE-2021-48018

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-48018. EPSS is 0.39%. Act only if a listed version of Storage corruption due to is installed.

Which versions are affected?

Compare what you have installed with 0.2.13 → 0.2.15. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.39%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 5, 2021 · GitHub Advisory Database

    Detected

    ### Background When attempting to use the v0.2.14 release, @pandadefi discovered an issue using the decorator. ### Impact Reentrancy protection storage slots get allocated to the same slots as storage variables, leading to the corruption of storage variables when using the decorator. ### Patches This issue was fixed in v0.2.15 in #2391, #2379 ### Workarounds Don't use the decorator in these versio

  2. Oct 24, 2026 · GitHub Advisory Database

    Fix available

    vyper fixed in 0.2.15

  3. Oct 24, 2026 · GitHub Advisory Database

    Fix available

    vyper fixed in 0.2.15

  4. Oct 24, 2026 · GitHub Advisory Database

    Updated

    ### Background When attempting to use the v0.2.14 release, @pandadefi discovered an issue using the decorator. ### Impact Reentrancy protection storage slots get allocated to the same slots as storage variables, leading to the corruption of storage variables when using the decorator. ### Patches This issue was fixed in v0.2.15 in #2391, #2379 ### Workarounds Don't use the decorator in these versio

Sources

References

Freshness

Last verified in this catalog Oct 25, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • PyPA Advisory DatabaseOct 26, 2026
  • FIRST EPSSOct 25, 2026
  • CVE.orgOct 24, 2026
  • GitHub Advisory DatabaseOct 24, 2026
  • OpenSSF OSV / OSV ScannerOct 24, 2026