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CVE-2026-46540

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:
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d13cac2bfdaca52a0442017a4c9bc5c45ead1eed091fd089d48d8f0423abd9f2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"core-rs-albatross","vendor":"nimiq","versions":[{"status":"affected","version":"< 1.4.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a02cdb5c8ce688cdfea5cf82d1d87e2096166cc5f2df501fee4ad0ef1715fa4c · sha256:816f3450f4ff2602… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a02cdb5c8ce688cdfea5cf82d1d87e2096166cc5f2df501fee4ad0ef1715fa4c · sha256:816f3450f4ff2602… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-841","description":"CWE-841: Improper Enforcement of Behavioral Workflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a02cdb5c8ce688cdfea5cf82d1d87e2096166cc5f2df501fee4ad0ef1715fa4c · sha256:816f3450f4ff2602… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/nimiq/core-rs-albatross/pull/3706","tags":["x_refsource_MISC"],"url":"https://github.com/nimiq/core-rs-albatross/pull/3706"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a02cdb5c8ce688cdfea5cf82d1d87e2096166cc5f2df501fee4ad0ef1715fa4c · sha256:816f3450f4ff2602… · /containers/cna/references/1
{"name":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0","tags":["x_refsource_MISC"],"url":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a02cdb5c8ce688cdfea5cf82d1d87e2096166cc5f2df501fee4ad0ef1715fa4c · sha256:816f3450f4ff2602… · /containers/cna/references/2
{"name":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-m3pg-qc2q-mg8c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-m3pg-qc2q-mg8c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a02cdb5c8ce688cdfea5cf82d1d87e2096166cc5f2df501fee4ad0ef1715fa4c · sha256:816f3450f4ff2602… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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