{"id":"GHSA-pf4j-pf3w-95f9","revision":"44c95a562b394be1a13f966127565456","records":[{"revision":"44c95a562b394be1a13f966127565456","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-pf4j-pf3w-95f9","aliases":["CVE-2026-34068"],"title":"nimiq-transaction: UpdateValidator transactions allows voting key change without proof-of-knowledge","description":"### Impact\nThe staking contract accepts `UpdateValidator` transactions that set `new_voting_key=Some(...)` while omitting `new_proof_of_knowledge`. this skips the proof-of-knowledge requirement that is needed to prevent BLS rogue-key attacks when public keys are aggregated.\n\nBecause tendermint macro block justification verification aggregates validator voting keys and verifies a single aggregated BLS signature against that aggregate public key, a rogue-key voting key in the validator set can allow an attacker to forge a quorum-looking justification while only producing a single signature.\n\nWhile the impact is critical, the exploitability is low: The voting keys are fixed for the epoch, so the attacker would need to know the next epoch validator set (chosen through VRF), which is unlikely.\n\n### Patches\n[The patch for this vulnerability](https://github.com/nimiq/core-rs-albatross/commit/e7f0ab7d2115e17d6e5548ddc60f10df1a5d645f) is included as part of [v1.3.0](https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0).\n\n### Workarounds\nNo known workarounds.","state":0,"publishedAt":"2026-04-22T19:22:53+00:00","modifiedAt":"2026-05-05T16:09:54.224832+00:00","affected":[{"ecosystem":"crates.io","name":"nimiq-transaction","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"0.2.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-pf4j-pf3w-95f9","https://nvd.nist.gov/vuln/detail/CVE-2026-34068","https://github.com/nimiq/core-rs-albatross/pull/3654","https://github.com/nimiq/core-rs-albatross/commit/e7f0ab7d2115e17d6e5548ddc60f10df1a5d645f","https://github.com/nimiq/core-rs-albatross","https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0"],"sourceUrl":"https://github.com/advisories/GHSA-pf4j-pf3w-95f9","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-pf4j-pf3w-95f9","identifiers":["GHSA-pf4j-pf3w-95f9","CVE-2026-34068"]},"retained":false,"historicalAffected":[]}],"coverage":[]}