CVE-2026-46540
- Source
- https://cve.org/CVERecord?id=CVE-2026-46540
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46540.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-46540
- Aliases
-
- GHSA-m3pg-qc2q-mg8c
- Published
- 2026-06-09T23:45:01Z
- Modified
- 2026-10-28T02:30:37Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
- Summary
- Nimiq light-blockchain: Light blockchain rebranch issue
- Details
-
Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.4.0, when LightBlockchain::rebranch() adopts a fork chain whose tip is a macro block (checkpoint or election), it only updates self.head but fails to update self.macro_head, self.election_head, self.current_validators, or store the election header in the chain_store. This is in direct contrast with the full Blockchain::rebranch() at blockchain/src/blockchain/push.rs:504-518, which correctly updates all macro/election state when the new head is a macro block. After a rebranch to a macro block, the stale macro_head causes subsequent macro blocks pushed via push() to be verified against the wrong predecessor via verify_macro_successor(&this.macro_head). If the rebranch target was an election block, the stale current_validators causes every subsequent block to fail verify_validators(), completely stalling the light client's chain progression. This issue has been patched in version 1.4.0.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-841" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46540.json" }- References
-
- https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46540.json
- https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-m3pg-qc2q-mg8c
- https://nvd.nist.gov/vuln/detail/CVE-2026-46540
- https://github.com/nimiq/core-rs-albatross/pull/3706
Affected packages
Git / github.com/nimiq/core-rs-albatross
Affected ranges
- Type
- GIT
- Repo
- https://github.com/nimiq/core-rs-albatross
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "1.4.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "original_tag": "v1.4.0", "range": [ { "fixed": "e156ecc4a14377eb3e4b71f340a8ae905b9864b2" } ], "source": "REFERENCES_TAG" }, { "range": [ { "introduced": "0" }, { "fixed": "1.4.0" } ], "source": "DESCRIPTION" } ] }