Vulnerability in getgrav/grav (CVE-2026-61690)
Summary
Vulnerability in getgrav/grav (CVE-2026-61690). Risk of unauthorized operations or information disclosure. Exploitable via ZipArchiver. Mitigation: upgrade to 2.0.1 or later.
Original description
The description as published by the source.
Summary
ZipArchiver::extract() lacks limits on uncompressed size, file count, and nesting depth, creating a distinct, unpatched variant of the GHSA-2vcx-h8p2-9pg9 zip bomb vulnerability. While the parallel method Installer::unZip() received comprehensive limits, ZipArchiver::extract() remains unprotected, leaving a separate code path vulnerable to the same attack vector. The vulnerability is a distinct, unpatched variant of the bug described in GHSA-2vcx-h8p2-9pg9, as it affects a separate code path in the same codebase, implementing the same abstract class.
Details
Vulnerable code - system/src/Grav/Common/Filesystem/ZipArchiver.php:29-58:
public function extract($destination, ?callable $status = null)
{
$zip = new ZipArchive();
$archive = $zip->open($this->archive_file);
if ($archive === true) {
Folder::create($destination);
// Only guards against Zip Slip (path traversal)
for ($i = 0, $count = $zip->count(); $i < $count; $i++) {
$name = $zip->getNameIndex($i);
if ($name !== false && !$this->isSafeEntryPath($name)) {
$zip->close();
throw new RuntimeException(...);
}
}
// Extracts EVERYTHING — no size, count, or depth limit
if (!$zip->extractTo($destination)) { ... }
$zip->close();
return $this;
}
}
What's missing vs Installer::unZip():
| Protection | Installer::unZip() | `ZipArchiver…
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-2026-61690 has been found in getgrav/grav.
Attackers can target a specific entry point like ZipArchiver over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.5/10.
What to do: upgrade getgrav/grav to 2.0.1 or later.
If unsure, ask your IT team or search "getgrav/grav CVE-2026-61690" on the vendor's site.
CVE-2026-61690 (getgrav/grav) — CWE-409 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: ZipArchiver / Archiver
Patched: 2.0.1 — 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-409) exists in getgrav/grav. Attackers reach the vulnerable code path via ZipArchiver.
Check the vendor advisory for the affected versions of getgrav/grav. Attack surface: ZipArchiver / Archiver.
Severity: Medium (CVSS 6.5/10). Risk of unauthorized operations or information disclosure.
Update to 2.0.1.
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 'getgrav/grav' . 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 'getgrav/grav' . | 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
getgrav/grav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 getgrav/grav to 2.0.1ステージング環境で 2.0.1 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
- web github.com
- web github.com
- web github.com
- web nvd.nist.gov
- web github.com