GHSA-rj53-j6jw-7f7g
Babylon vulnerable to chain halt when a message modifies the validator set at the epoch boundary
GHSA-rj53-j6jw-7f7g is a high vulnerability (CVSS 8.9) in github.com/babylonlabs-io/babylon/v2, published July 8, 2025. No source lists public exploit code. Fixed in github.com/babylonlabs-io/babylon/v2 2.1.0.
- Severity
- 8.9 HighCVSS 4.0, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
2.1.0github.com/babylonlabs-io/babylon/v2 +1 more
Description
Summary
Sending a message that modifies the validator set at the epoch boundary halts the chain.
Impact
Denial of Service - Comos-sdk prevents modifying the validator set from two different modules - https://github.com/cosmos/cosmos-sdk/blob/release/v0.50.x/types/module/module.go#L811. Such an operation leads to panic and chain halt.
Detailed Post mortem
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/babylonlabs-io/babylon/v2Go | 2.0.0 up to 2.1.0 | 2.1.0 |
github.com/babylonlabs-io/babylonGo | All versions | None known |
What each source reports
GitHub Advisories Score used
Babylon vulnerable to chain halt when a message modifies the validator set at the epoch boundary
Summary
Sending a message that modifies the validator set at the epoch boundary halts the chain.
Impact
Denial of Service - Comos-sdk prevents modifying the validator set from two different modules - https://github.com/cosmos/cosmos-sdk/blob/release/v0.50.x/types/module/module.go#L811. Such an operation leads to panic and chain halt.
Detailed Post mortem
- Record
GHSA-rj53-j6jw-7f7g- CVSS 4.0
- 8.9 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H - Weakness
- CWE-754
- Updated
- 2026-11-02
OSV
Babylon vulnerable to chain halt when a message modifies the validator set at the epoch boundary
Summary
Sending a message that modifies the validator set at the epoch boundary halts the chain.
Impact
Denial of Service - Comos-sdk prevents modifying the validator set from two different modules - https://github.com/cosmos/cosmos-sdk/blob/release/v0.50.x/types/module/module.go#L811. Such an operation leads to panic and chain halt.
Detailed Post mortem
- Record
GHSA-rj53-j6jw-7f7g- CVSS 4.0
- 8.9 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H - Weakness
- CWE-754
- Updated
- 2026-11-02
OSVGO-2025-3801No score
Babylon vulnerable to chain halt when a message modifies the validator set at the epoch boundary in github.com/babylonlabs-io/babylon
Babylon vulnerable to chain halt when a message modifies the validator set at the epoch boundary in github.com/babylonlabs-io/babylon
- Record
GO-2025-3801- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
github.com/babylonlabs-io/babylon/security/advisories/GHSA-rj53-j6jw-7f7g
boiling-lake-106.notion.site/2025-06-18-Babylon-Genesis-Chain-Halt-Post-Mortem-229f60cc1b5f80b7adf5e3ea0541ea87