Information Disclosure in prompty (CVE-2026-53598)
Summary
Vulnerability in prompty (CVE-2026-53598). Confidential information can be exposed externally. Exploitable via prompty. Mitigation: upgrade to 2.0.0b2 or later.
Original description
The description as published by the source.
Prompty is a markdown file format (.prompty) for LLM prompts. Prior to 2.0.0-beta.2, Prompty loaders expanded ${file:...} references in .prompty frontmatter without enforcing that resolved paths stayed within the prompt directory or allowed roots, allowing an attacker-controlled prompt file to read local files through absolute paths, .. traversal, or symlink escapes. This issue is fixed in versions 2.0.0-beta.2.
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-2026-53598 has been found in prompty.
Attackers can target a specific entry point like prompty over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.5/10.
What to do: upgrade prompty to 2.0.0b2 or later.
If unsure, ask your IT team or search "prompty CVE-2026-53598" on the vendor's site.
CVE-2026-53598 (prompty) — CWE-200 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: prompty / Prompty.Core
Patched: 2.0.0b2 — 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.
Information disclosure (CWE-200) exists in prompty. Attackers reach the vulnerable code path via prompty without authentication.
Check the vendor advisory for the affected versions of prompty. Attack surface: prompty / Prompty.Core.
Severity: High (CVSS 7.5/10). Confidential information can be exposed externally.
Update to 2.0.0b2.
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 'prompty' . 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 'prompty' . | 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
prompty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 prompty to 2.0.0b2ステージング環境で 2.0.0b2 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 github.com
- advisory nvd.nist.gov
- advisory github.com
- advisory github.com
- package github.com
- package pypi.org
- patch github.com