If you have seen a headline this summer reading "Supreme Court sides with Monsanto" and concluded the Roundup cases are finished, read this before you draw that conclusion. The Court decided one question about one theory of liability. It is a real setback for that theory. But it is not the end of Roundup litigation, and it does not touch the theory our firm has led with from the beginning.
What the Supreme Court Actually Held in Monsanto v. Durnell
On June 25, 2026, in Monsanto Co. v. Durnell, the Supreme Court held by a vote of 7-2 that the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) preempts a state-law failure-to-warn claim against a pesticide maker where the EPA has evaluated the risk and approved a label that does not carry the warning the plaintiff says was required. In plain terms: a state jury cannot effectively order a warning the federal regulator never demanded.
John Durnell was a Missouri gardener who said he used Roundup for roughly two decades before he was diagnosed with non-Hodgkin lymphoma. He sued in 2019 on a failure-to-warn theory, and a Missouri jury found in his favor. Monsanto argued on appeal that FIFRA's preemption clause — which bars states from imposing labeling requirements "in addition to or different from" the federal ones — blocked that claim because the EPA had repeatedly declined to require a cancer warning for glyphosate. The Supreme Court agreed.
Justice Brett Kavanaugh wrote for the majority. As he framed it, a manufacturer "legally must use a label without a cancer warning unless and until EPA approves or requires a change." Because the failure-to-warn verdict rested on the premise that Monsanto should have added a warning the EPA had not required, the Court held the claim was preempted.
What the Decision Does — and Does Not — Do
The most important thing to understand about Durnell is how narrow it is. The Court answered a specific preemption question about a specific theory. It did not declare Roundup safe, it did not overturn the science, and it did not close the courthouse doors to every Roundup plaintiff.
What is now preempted
State-law failure-to-warn claims — the argument that Monsanto breached a duty by not putting a cancer warning on the Roundup label — are preempted where the EPA affirmatively evaluated the cancer risk and approved the existing label. Robert L. Rabin, a torts professor at Stanford Law School, observed that the ruling "dispatches not just Durnell's suit, but many thousands of other outstanding, similar claims in other state courts." For cases built primarily on the failure-to-warn theory, that is a significant blow.
What the Court did not decide
The opinion is limited to failure-to-warn. It did not address — and legal commentators reading the decision emphasize this — theories of liability that do not depend on the label's content. Analysts at the firm Crowell & Moring, writing on the decision, identified several categories the ruling does not reach: design-defect and manufacturing-defect claims, strict-liability claims not predicated on label content, and claims involving risks the EPA never actually considered (a boundary the Court "did not squarely resolve"). None of those theories was before the Court in Durnell, and the decision leaves them for the lower courts.
Why This Reinforces the Strategy We Used From the Start
Long before Durnell, our firm wrote about the difference between two ways of holding Monsanto accountable. One is failure-to-warn: the label should have said more. The other is strict product liability based on design defect: the product was unreasonably dangerous as designed, regardless of what the label said. We have consistently emphasized the second theory because it does not rise or fall on what the EPA required a warning to say.
That distinction, which once looked like a matter of trial strategy, now looks structural. Durnell preempts claims that turn on the label. A design-defect claim does not turn on the label — it turns on whether the formulation itself, and the science Monsanto possessed about it, made the product unreasonably dangerous to the people who used it as intended. The Supreme Court did not decide that question. This is the same defective-product framework The Alvarez Law Firm has used against other manufacturers, and it is the reason our Roundup cases were never built solely on the warning label.
We want to be precise here, because Roundup coverage tends toward hype in both directions. Durnell is not a green light and it is not a death sentence. It is a narrowing. Whether any individual case can move forward after Durnell depends on the facts, the diagnosis, the exposure record, and the theories available under the law of the relevant state. That is a case-by-case question, not a headline.
The Dissent and the Limits of the Holding
The decision was not unanimous, and the dissent matters for understanding how contested this ground remains. Justice Ketanji Brown Jackson, joined by Justice Neil Gorsuch, argued that the majority "misunderstands FIFRA's requirements, misinterprets the scope of FIFRA's preemption, and ultimately leaves Durnell without a remedy for the significant harms he has suffered." In her reading, FIFRA does not eliminate a state's authority over the conduct at issue, and the majority rested on "a labeling requirement that does not exist."
Professor Rabin made a related structural point: preemption outcomes hinge on "the clarity of the agency's position — which is often far from evident." Where the EPA's evaluation of a particular risk is thin, ambiguous, or was never conducted at all, the preemption defense is weaker. That is why the depth and specificity of the EPA's review of the exact risk at issue — not a general assertion that "the label was approved" — will be litigated case by case going forward.
It is also worth remembering how we got here. For years the appellate courts split on this question. The Ninth Circuit, in the Hardeman litigation, had rejected the preemption argument, and in 2022 the Supreme Court declined to review that ruling — a decision we and others read at the time as leaving the failure-to-warn theory intact. Durnell resolved the split the other way. The lesson for anyone considering a case is not that the law is settled, but that it moves, and that the theory a case is built on matters enormously.
What This Means If You Were Diagnosed With a Roundup-Linked Cancer
Several practical points follow from the decision.
- Do not assume your case is gone. If your matter was built on, or can be built on, a design-defect or strict-liability theory rather than the label, Durnell did not decide it. The only way to know is to have the specific facts reviewed.
- The diagnosis and exposure records matter more than ever. A strong, well-documented exposure history and a clearly established qualifying diagnosis — such as non-Hodgkin lymphoma and its subtypes — are the foundation of a case under any surviving theory.
- The EPA's evaluation is now a live issue. Because preemption depends on whether the EPA actually evaluated the specific cancer risk, the long-running disagreement between IARC and the EPA on glyphosate is more central to the litigation than ever.
- Timing still counts. The legal landscape, and the separate settlement environment, continue to evolve. Our read on how Bayer is approaching new cases in 2026 covers that moving picture in detail.
Frequently Asked Questions
Does the Monsanto v. Durnell decision mean I can no longer file a Roundup lawsuit?
No. The decision addressed one theory of liability — the state-law failure-to-warn claim — and held that federal law preempts it where the EPA evaluated the risk and approved the label. The Court did not decide whether design-defect, manufacturing-defect, or strict-liability claims that do not depend on the label content are preempted. Those theories were not before the Court. Whether a specific case can proceed depends on its facts and the theories pleaded, which is why an individual review matters.
What is FIFRA preemption in plain English?
FIFRA is the federal pesticide law. It says states cannot impose labeling requirements that are "in addition to or different from" the federal requirements the EPA enforces. In Durnell, the Supreme Court read that clause to bar a state jury from effectively ordering Monsanto to add a cancer warning the EPA never required. That is what "preemption" means here: federal law displaces the conflicting state-law claim.
Which Roundup claims did the Supreme Court say survive?
The Court did not create a list of surviving claims. It ruled only on the failure-to-warn theory. Legal commentators reading the opinion note that claims not predicated on the label — such as design-defect and strict-liability claims arguing the product itself was unreasonably dangerous — were not addressed by the decision and remain open questions in the lower courts.
Was the ruling unanimous?
No. The vote was 7-2. Justice Brett Kavanaugh wrote the majority opinion. Justice Ketanji Brown Jackson wrote a dissent joined by Justice Neil Gorsuch, arguing that the majority misread FIFRA and left the plaintiff without a remedy for real harm.
Bottom Line
Monsanto v. Durnell is the most consequential Roundup ruling in years, and it genuinely narrows the failure-to-warn theory that carried many cases. But narrowing is not closing. The Court did not touch design-defect and strict-liability theories, it did not resolve what happens where the EPA never evaluated a risk, and two Justices dissented sharply. If you or a family member used Roundup and were later diagnosed with Non-Hodgkin Lymphoma, B-cell Lymphoma, Chronic Lymphocytic Leukemia, or Multiple Myeloma, the right next step after Durnell is a careful, individualized read of your records under the theories that survive.
At our firm, Herb Borroto, M.D., J.D., reads the pathology, the immunohistochemistry, and the oncology charts himself, and Alex Alvarez, Managing Partner and Board Certified Civil Trial Lawyer, evaluates the legal theory each case can support. The free case review is exactly what it says: no obligation, and no fee unless we recover for you. Our companion guide on who qualifies for a Roundup lawsuit walks through what we look at.