{"answers":{"affected":"12 open source packages ship an affected version, including github.com/babylonlabs-io/babylon, github.com/babylonlabs-io/babylon/v2 and github.com/babylonlabs-io/babylon/v3.","exploited":"There is no known exploitation of GHSA-4rmq-mc2c-r495 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"GHSA-4rmq-mc2c-r495 is a vulnerability in github.com/babylonlabs-io/babylon, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for GHSA-4rmq-mc2c-r495 and fix it if it is affected.\n\nWhat it is: GHSA-4rmq-mc2c-r495 is a vulnerability in github.com/babylonlabs-io/babylon, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of GHSA-4rmq-mc2c-r495 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/babylonlabs-io/babylon (Go): affected all versions; no fix listed\n- github.com/babylonlabs-io/babylon (Go): affected all versions up to 1.1.0; no fix listed\n- github.com/babylonlabs-io/babylon (Go): affected all versions up to 1.1.0; no fix listed\n- github.com/babylonlabs-io/babylon/v2 (Go): affected all versions; no fix listed\n- github.com/babylonlabs-io/babylon/v2 (Go): affected all versions up to 2.3.2; no fix listed\n- github.com/babylonlabs-io/babylon/v2 (Go): affected all versions up to 2.3.2; no fix listed\n- github.com/babylonlabs-io/babylon/v3 (Go): affected all versions; no fix listed\n- github.com/babylonlabs-io/babylon/v3 (Go): affected all versions up to 3.0.0-snapshot.250805a; no fix listed\n- github.com/babylonlabs-io/babylon/v3 (Go): affected all versions up to 3.0.0-snapshot.250805a; no fix listed\n- github.com/babylonlabs-io/babylon/v4 (Go): affected all versions; fixed in 4.2.0\n- github.com/babylonlabs-io/babylon/v4 (Go): affected all versions; fixed in 4.2.0\n- github.com/babylonlabs-io/babylon/v4 (Go): affected all versions; fixed in 4.2.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/GHSA-4rmq-mc2c-r495/ (Markdown: https://insights.sbomify.com/GHSA-4rmq-mc2c-r495/index.md)","id":"GHSA-4rmq-mc2c-r495","markdown":"https://insights.sbomify.com/GHSA-4rmq-mc2c-r495/index.md","name":"GHSA-4rmq-mc2c-r495","record":{"aliases":["GO-2025-4214"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_modify","other"],"network_reachable":"yes","non_default_config":false,"product_category":"Babylon blockchain","requires_auth":"none","summary":"A state consistency bug allows attackers to earn costaking rewards without backing BTC by exploiting a race condition during unbonding.","user_interaction":"not_required","vuln_class":"business_logic"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"### Summary\n\nA state consistency bug in `x/costaking` can leave a BTC delegator with non-zero `ActiveSatoshis` (Phatom Stake) even after they have fully unbonded their BTC delegation, if their Finality Provider (FP) drops out of the active set in the exact same babylon block height. This creates a “phantom stake”: the delegator’s BTC capital is withdrawn, the FP is inactive, but costaking continues to treat the delegation as active BTC stake allowing ongoing rewards accrual without backing BTC.\n\n### Impact\n\nAn address can keep earning costaking rewards with zero BTC staked.\n\nReported by @BottyBott.","ecosystems":["Go"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":true,"headline":"Babylon Incorrect FP inactive accounting in costaking creates “phantom stake” that earns rewards after BTC unbond","id":"GHSA-4rmq-mc2c-r495","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"Go","product":null,"products":[],"type":"business_logic","year":"2025"},"n_packages":12,"n_references":null,"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/babylonlabs-io/babylon","purl":"pkg:golang/github.com/babylonlabs-io/babylon","source":"GO-2025-4214"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.1.0"],"package":"github.com/babylonlabs-io/babylon","purl":null,"source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.1.0"],"package":"github.com/babylonlabs-io/babylon","purl":"pkg:golang/github.com/babylonlabs-io/babylon","source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/babylonlabs-io/babylon/v2","purl":"pkg:golang/github.com/babylonlabs-io/babylon/v2","source":"GO-2025-4214"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["2.3.2"],"package":"github.com/babylonlabs-io/babylon/v2","purl":null,"source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["2.3.2"],"package":"github.com/babylonlabs-io/babylon/v2","purl":"pkg:golang/github.com/babylonlabs-io/babylon/v2","source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/babylonlabs-io/babylon/v3","purl":"pkg:golang/github.com/babylonlabs-io/babylon/v3","source":"GO-2025-4214"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["3.0.0-snapshot.250805a"],"package":"github.com/babylonlabs-io/babylon/v3","purl":null,"source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["3.0.0-snapshot.250805a"],"package":"github.com/babylonlabs-io/babylon/v3","purl":"pkg:golang/github.com/babylonlabs-io/babylon/v3","source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":["4.2.0"],"introduced":["0"],"last_affected":[],"package":"github.com/babylonlabs-io/babylon/v4","purl":null,"source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":["4.2.0"],"introduced":["0"],"last_affected":[],"package":"github.com/babylonlabs-io/babylon/v4","purl":"pkg:golang/github.com/babylonlabs-io/babylon/v4","source":"GHSA-4rmq-mc2c-r495"},{"ecosystem":"Go","fixed":["4.2.0"],"introduced":["0"],"last_affected":[],"package":"github.com/babylonlabs-io/babylon/v4","purl":"pkg:golang/github.com/babylonlabs-io/babylon/v4","source":"GO-2025-4214"}],"products":null,"published":"2025-12-09","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"A state consistency bug allows attackers to earn costaking rewards without backing BTC by exploiting a race condition during unbonding.","url":"https://insights.sbomify.com/GHSA-4rmq-mc2c-r495/"}