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Cosmos SDK: x/group can halt when erroring in EndBlockerGHSA-47ww-ff84-4jrg

Fix: cosmos/cosmos-sdk@cbd69fb

GHSA-47ww-ff84-4jrg is a security vulnerability in github.com/cosmos/cosmos-sdk. A fix is available for github.com/cosmos/cosmos-sdk — see the affected versions and patch details below.

Also known asGO-2025-3516
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Aug 20, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

2 pkgs affected
🐹github.com/cosmos/cosmos-sdk🐹github.com/cosmos/cosmos-sdk

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Name: ISA-2025-002: x/group can halt when erroring in EndBlocker Component: CosmosSDK Criticality: High (Considerable Impact; Likely Likelihood per ACMv1.2) Affected versions: <= v0.47.16, <= 0.50.12 Affected users: Validators, Full nodes, Users on chains that utilize the groups module Cosmos SDK chains in unpatched releases that use the x/group module are affected.

Description

An issue was discovered in the groups module where malicious proposals would result in an errors triggered in the module's end blocker that could result in a chain halt. Any set of users that can interact with the groups module could introduce this state.

Patches

Has the problem been patched? What versions should users upgrade to?

The new Cosmos SDK release v0.50.13 and v0.47.17 fix this issue.

Testing

Testing we have done to gain more confidence in this release:

In addition to testing Cosmos SDK we also did the following:

  • Ran a patched node in a local v0.50 testnet with the failing state and did not halt (an unpatched network confirmed to halt)
  • Ran a patched node on Xion Mainnet (uses x/group)
  • Ran a patched node on Zetachain Mainnet (uses x/xgroup)

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

There are no known workarounds for this issue. It is advised that chains apply the update.

This issue was reported to the Cosmos Bug Bounty Program by wbowling on HackerOne on February 28, 2025. If you believe you have found a bug in the Interchain Stack or would like to contribute to the program by reporting a bug, please see https://hackerone.com/cosmos.

If you have questions about Interchain security efforts, please reach out to our official communication channel at [email protected]. For more information about the Interchain Foundation’s engagement with Amulet, and to sign up for security notification emails, please see https://github.com/interchainio/security.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/cosmos/cosmos-sdk≥ 0.50.0-alpha.0&&< 0.50.130.50.13go get github.com/cosmos/cosmos-sdk@v0.50.13
🐹Gogithub.com/cosmos/cosmos-sdkall versions0.47.17go get github.com/cosmos/cosmos-sdk@v0.47.17

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/cosmos/cosmos-sdk, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/cosmos/cosmos-sdk to 0.50.13 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-47ww-ff84-4jrg is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Name: ISA-2025-002: x/group can halt when erroring in EndBlocker Component: CosmosSDK Criticality: High (Considerable Impact; Likely Likelihood per [ACMv1.2](https://github.com/interchainio/security/blob/main/resources/CLASSIFICATION_MATRIX.md)) Affected versions: <= v0.47.16, <= 0.50.12 Affected users: Validators, Full nodes, Users on chains that utilize the groups module Cosmos SDK chains in unpatched releases that use the `x/group` module are affected. ### Description An issue was discovered in the groups module where malicious proposals would result in an errors triggered in the module's
O3 Security · Impact-Aware SCA

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Cosmos SDK: x/group can halt when erroring in EndBlocker