HP Printer Firmware Lawsuit 2026: What Owners Need to Know About Third-Party Ink Blocking

Several 2026 lawsuits accuse HP of using firmware updates to block ink cartridges that aren't HP-branded from working, even when those cartridges function fine. Here's what's actually being alleged and what it means for you.

What's Being Alleged

Plaintiffs claim HP pushed firmware updates through routine downloads that quietly added authentication checks, causing third-party or refilled cartridges to stop working or show false error messages. This follows a pattern reported by Ars Technica, where HP's "Dynamic Security" firmware has faced repeated legal challenges for limiting which cartridges can work in HP printers.

This Isn't the First Time

HP's Dynamic Security firmware has a long history of controversy, HP previously settled a class action over the same basic complaint: firmware updates that blocked non-HP cartridges after the fact, without always making that clear to customers upfront. The pattern in these newer lawsuits looks similar: an update goes out, and cartridges that worked fine the day before suddenly don't.

How to Protect Yourself

• Check your printer's update settings and consider disabling automatic firmware updates if cartridge compatibility matters to you.
• Before buying compatible cartridges, check user reviews for your specific printer model to see if others report update-related issues.
• Keep records of receipts if a cartridge stops working right after an update, in case you want to join a class action or request a refund.

If a firmware update has already left you with a cartridge your printer refuses to recognize, our guide on how to bypass an incompatible HP ink cartridge covers the workarounds worth trying first.

It's also worth reading about HP's recent antitrust fine in India, part of a broader pattern of regulatory scrutiny over how the company sells ink and toner. If you want to avoid firmware headaches altogether, browse our compatible HP ink cartridges, tested for reliable performance.