Vulnerability in grid (CVE-2026-42199)
Summary
Vulnerability in grid (CVE-2026-42199). Risk of unauthorized operations or information disclosure. Exploitable via get_unchecked. Mitigation: upgrade to 1.0.1 or later.
Original description
The description as published by the source.
Summary
An integer overflow in Grid::expand_rows() can corrupt the relationship between the grid’s logical dimensions and its backing storage. After the internal invariant is broken, the safe API get() may invoke get_unchecked() with an invalid index, resulting in Undefined Behavior.
Details
Tested Version: grid = "1.0.0"
expand_rows() computes the new backing length using unchecked arithmetic:
self.data.len() + rows * self.cols
If rows * self.cols or the subsequent addition overflows usize, the result wraps in release builds and self.data may be resized to a length much smaller than logically required.
After that, if the grid is in ColumnMajor order, the function performs in-place rotation using indices derived from:
let total_rows = self.rows + row_added;
let col_idx = i * total_rows;
self.data[col_idx..col_idx + total_rows + i].rotate_right(i);
These computations also rely on the assumption that the backing storage has been resized to the correct length. Once the earlier length computation has wrapped, this assumption no longer holds, so the function may operate on invalid ranges or otherwise enter an inconsistent state.
Finally, the function updates logical metadata with:
self.rows += rows;
As a result, the grid can end up with logical dimensions that no longer match the actual backing storage. Subsequent safe API calls such as get() may then rely on corrupted metadata and reach unsafe internal accesses, resulting in invalid unchecked acc…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-42199 has been found in grid.
Attackers can target a specific entry point like get_unchecked over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.2/10.
What to do: upgrade grid to 1.0.1 or later.
If unsure, ask your IT team or search "grid CVE-2026-42199" on the vendor's site.
CVE-2026-42199 (grid) — CWE-190 / CVSS v3 6.2
Attack vector: local / unauthenticated / no user interaction
Attack surface: get_unchecked / assume / false
Patched: 1.0.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-190) exists in grid. Attackers reach the vulnerable code path via get_unchecked without authentication.
Check the vendor advisory for the affected versions of grid. Attack surface: get_unchecked / assume / false.
Severity: Medium (CVSS 6.2/10). Risk of unauthorized operations or information disclosure.
Update to 1.0.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'grid' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'grid' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
gridを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade grid to 1.0.1ステージング環境で 1.0.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com