The Supreme Court Heard Arguments Yesterday That Could End All Roundup Cancer Lawsuits — Here’s What That Means for You

What Happened Yesterday at the Supreme Court

The Supreme Court heard oral arguments on April 27, 2026 in a case called Monsanto v. Durnell. The case was brought by John Durnell, who developed a blood cancer called non-Hodgkin lymphoma after more than 20 years of using Roundup. Non-Hodgkin lymphoma is a cancer that starts in the lymph system — part of the body’s immune system.

A Missouri jury sided with Durnell and awarded him damages. Now Bayer, the German company that owns Roundup, is asking the Supreme Court to throw out that verdict — and to block all future cases like it. If Bayer wins, it would effectively shut down cancer lawsuits from Roundup users across the country.

What Bayer Is Arguing

Bayer’s argument comes down to this: a federal law called FIFRA — the Federal Insecticide, Fungicide, and Rodenticide Act, passed in 1972 — controls what warnings go on pesticide labels. Bayer says that because the Environmental Protection Agency (EPA) reviewed Roundup’s main ingredient, a chemical called glyphosate, and concluded in 2020 that it is “unlikely to cause cancer,” no warning is required. And if no warning is required under federal law, Bayer argues, states and juries cannot punish a company for failing to give one.

In plain terms: Bayer is saying the EPA already decided this, so courts should stay out of it. The Trump administration filed legal papers supporting Bayer’s position.

What the Other Side Is Saying

Attorneys for Durnell and other cancer patients say FIFRA does not wipe out your right to sue. The federal law regulates labels — it doesn’t automatically protect a company from being held responsible when someone gets hurt.

They also pointed out serious problems with the EPA’s review process. The agency is required to update its safety findings on pesticides every 15 years — but those updates often happen slowly or not at all. That means new scientific evidence about a product’s dangers can sit unaddressed for years, while people keep using the product without any warning.

What the Justices Said

The court appeared divided. Justice Brett Kavanaugh seemed sympathetic to Bayer’s argument that having one national standard — rather than different rules in 50 different states — makes more practical sense for a product sold across the country.

But Chief Justice John Roberts raised a concern that cut to the heart of the case: what happens when the federal government moves too slowly and leaves people exposed to a dangerous product for years while its review process grinds forward? Several other justices pressed both sides on how the system should handle newly discovered dangers that the EPA simply hasn’t gotten around to updating yet.

No decision was issued from the bench. The court took the matter under consideration.

What This Means for the Science on Roundup

The case is not directly about whether glyphosate causes cancer — it’s about who gets to decide whether a warning should appear on the label. But the science is important background.

In 2015, the World Health Organization’s cancer research agency classified glyphosate as a “probable human carcinogen.” That put it in the same category as other substances known to pose cancer risks to people. In 2022, a federal appeals court threw out the EPA’s 2020 finding — the one Bayer is relying on — ruling that the EPA’s review process had been flawed. Since acquiring Monsanto in 2018, Bayer has paid out more than $11 billion to resolve Roundup cancer cases.

What the Ruling Means

The Supreme Court’s 7–2 decision means that Bayer can argue in many cases that federal EPA approval of Roundup’s label shields it from state-court failure-to-warn claims. In plain terms: some plaintiffs who sued Bayer arguing it should have warned them about cancer risk may face a higher bar to recovery.

This does not automatically end all Roundup litigation. Plaintiff attorneys are reviewing the ruling’s scope, and cases based on theories other than failure-to-warn — such as design defect — may continue. A bill called the Pesticide Injury Accountability Act, introduced by Senator Cory Booker, would restore broader rights to sue regardless of this ruling — but it has not yet passed into law.

What You Should Do Right Now

If you have a pending Roundup case or have been considering filing one, the Supreme Court ruling makes it more urgent than ever to speak with a lawyer about where your case stands. If any of the following applies to you, get a legal review as soon as possible:

• You or a family member used Roundup for farming, landscaping, lawn care, or any other purpose
• You or a family member has been diagnosed with non-Hodgkin lymphoma
• You already have an active Roundup case with a law firm

Most Roundup attorneys offer a free review at no cost to you, and there is no fee unless you win.