CVE-2026-53598: Prompty is a markdown file format (.prompty) for LLM prompts

Q: How do I fix CVE-2026-53598?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Q: Is CVE-2026-53598 being exploited?

CVE-2026-53598 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-53598 affect?

CVE-2026-53598 affects affected software. Severity is high (CVSS 7.5). 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

Q: How urgent is CVE-2026-53598?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTE

CVE-2026-53598 is a high-severity flaw (CVSS 7.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-22, CWE-200
Published	2026-07-16
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-07-16 16:19 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

Exact fixes by distribution

Python (pip) · prompty · FIXED · 2.0.0b2 · vulnerable: <= 2.0.0b1 · source

pip install --upgrade "prompty>=2.0.0b2" pip show prompty

npm · @prompty/core · FIXED · 2.0.0-beta.2 · vulnerable: <= 2.0.0-beta.1 · source

npm install @prompty/core@">=2.0.0-beta.2" npm ls @prompty/core

Rust (Cargo) · prompty · FIXED · 2.0.0-beta.2 · vulnerable: <= 2.0.0-beta.1 · source

Set prompty >= 2.0.0-beta.2 in Cargo.toml, then run: cargo update -p prompty

NuGet (.NET) · Prompty.Core · FIXED · 2.0.0-beta.2 · vulnerable: <= 2.0.0-beta.1 · source

dotnet add package Prompty.Core --version 2.0.0-beta.2

Fedora 46 · perl-Alien-Brotli · FIXED · 0.2.2-16.fc46 · FEDORA-2026-a2abe3db79 · source

sudo dnf upgrade --advisory=FEDORA-2026-a2abe3db79

Fedora ELN · mariadb-connector-odbc · FIXED · 3.2.10-1.eln159 · FEDORA-2026-b481dcd597 · source

sudo dnf upgrade --advisory=FEDORA-2026-b481dcd597

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-53598?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-53598 being exploited?

CVE-2026-53598 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-53598 affect?

CVE-2026-53598 affects affected software. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-53598?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

References

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