Vulnerability in Pallets Project flask (CVE-2018-1000656)

Summary

Vulnerability in Pallets Project flask (CVE-2018-1000656). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.12.3 or later.

Original description

The description as published by the source.

The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3. NOTE: this may overlap CVE-2019-1010083.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

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-2018-1000656 has been found in Pallets Project flask.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Pallets Project flask to 0.12.3 or later.
If unsure, ask your IT team or search "Pallets Project flask CVE-2018-1000656" on the vendor's site.

CVE-2018-1000656 (Pallets Project flask)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 0.12.3 — 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.

❓ What is the problem

A vulnerability (unclassified) exists in Pallets Project flask.

📍 Affected scope

Check the vendor advisory for the affected versions of Pallets Project flask.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 0.12.3.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
Audit SBOM/dependencies for affected components.
```
資産台帳・SBOM・依存マニフェストで Pallets Project flask を使っているサービスとバージョンを洗い出す。
2
Apply patch patch
```
Upgrade Pallets Project flask to 0.12.3
```
ステージング環境で 0.12.3 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。
3
Post-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。

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2018-1000656 flask Fixed in: 1.0.2-1