GHSA-95rx-m9m5-m94v
ASA-2024-006: ValidateVoteExtensions helper function in Cosmos SDK may allow incorrect voting power assumptions
ASA-2024-006: ValidateVoteExtensions helper function may allow incorrect voting power assumptions
Component: Cosmos SDK Criticality: High Affected Versions: Cosmos SDK versions <= 0.50.4, on 0.50 branches Affected Users: Chain developers, Validator and Node operators Impact: Elevation of Privilege
Summary
The default ValidateVoteExtensions helper function infers total voting power based off of the injected VoteExtension, which are injected by the proposer. If your chain utilizes the ValidateVoteExtensions helper in ProcessProposal, a dishonest proposer can potentially mutate voting power of each validator it includes in the injected VoteExtension, which could have potentially unexpected or negative consequences on modified state. Additional validation on injected VoteExtension data was added to confirm voting power against the state machine.
Next Steps for Impacted Parties
If you are a chain developer on an affected version of the Cosmos SDK, it is advised to update to the latest available version of the Cosmos SDK for your project. Once a patched version is available, it is recommended that network operators upgrade.
A Github Security Advisory for this issue is available in the Cosmos-SDK repository. For more information about Cosmos SDK, see https://docs.cosmos.network/.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- High
What each source reports
GitHub Advisories Score used
ASA-2024-006: ValidateVoteExtensions helper function in Cosmos SDK may allow incorrect voting power assumptions
ASA-2024-006: ValidateVoteExtensions helper function may allow incorrect voting power assumptions
Component: Cosmos SDK Criticality: High Affected Versions: Cosmos SDK versions <= 0.50.4, on 0.50 branches Affected Users: Chain developers, Validator and Node operators Impact: Elevation of Privilege
Summary
The default ValidateVoteExtensions helper function infers total voting power based off of the injected VoteExtension, which are injected by the proposer. If your chain utilizes the ValidateVoteExtensions helper in ProcessProposal, a dishonest proposer can potentially mutate voting power of each validator it includes in the injected VoteExtension, which could have potentially unexpected or negative consequences on modified state. Additional validation on injected VoteExtension data was added to confirm voting power against the state machine.
Next Steps for Impacted Parties
If you are a chain developer on an affected version of the Cosmos SDK, it is advised to update to the latest available version of the Cosmos SDK for your project. Once a patched version is available, it is recommended that network operators upgrade.
A Github Security Advisory for this issue is available in the Cosmos-SDK repository. For more information about Cosmos SDK, see https://docs.cosmos.network/.
- Record
GHSA-95rx-m9m5-m94v- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
ASA-2024-006: ValidateVoteExtensions helper function in Cosmos SDK may allow incorrect voting power assumptions
ASA-2024-006: ValidateVoteExtensions helper function may allow incorrect voting power assumptions
Component: Cosmos SDK Criticality: High Affected Versions: Cosmos SDK versions <= 0.50.4, on 0.50 branches Affected Users: Chain developers, Validator and Node operators Impact: Elevation of Privilege
Summary
The default ValidateVoteExtensions helper function infers total voting power based off of the injected VoteExtension, which are injected by the proposer. If your chain utilizes the ValidateVoteExtensions helper in ProcessProposal, a dishonest proposer can potentially mutate voting power of each validator it includes in the injected VoteExtension, which could have potentially unexpected or negative consequences on modified state. Additional validation on injected VoteExtension data was added to confirm voting power against the state machine.
Next Steps for Impacted Parties
If you are a chain developer on an affected version of the Cosmos SDK, it is advised to update to the latest available version of the Cosmos SDK for your project. Once a patched version is available, it is recommended that network operators upgrade.
A Github Security Advisory for this issue is available in the Cosmos-SDK repository. For more information about Cosmos SDK, see https://docs.cosmos.network/.
- Record
GHSA-95rx-m9m5-m94v- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVGO-2024-2638No score
ValidateVoteExtensions function in Cosmos SDK may allow incorrect voting power assumptions in github.com/cosmos/cosmos-sdk
The default ValidateVoteExtensions helper function infers total voting power based on the injected VoteExtension, which are injected by the proposer.
If your chain utilizes the ValidateVoteExtensions helper in ProcessProposal, a dishonest proposer can potentially mutate voting power of each validator it includes in the injected VoteExtension, which could have potentially unexpected or negative consequences on modified state. Additional validation on injected VoteExtension data was added to confirm voting power against the state machine.
- Record
GO-2024-2638- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/cosmos/cosmos-sdkGo | 0.50.0 to 0.50.4 | 0.50.5 |
github.com/cosmos/cosmos-sdkGo | 0.50.0 up to 0.50.5 | 0.50.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-95rx-m9m5-m94v is a high vulnerability (CVSS 7.1) in github.com/cosmos/cosmos-sdk, published March 12, 2024. No source lists public exploit code. Fixed in github.com/cosmos/cosmos-sdk 0.50.5.