The committee voted this year to release the 6,000-page report’s executive summary, but the release has been held up for months because of tense negotiations between the committee and the Obama administration over how much of the report would be declassified. It is unclear why Mr. Kerry waited until just before the report was scheduled to be released to sound alarms, since there has long been concern within the American intelligence agencies about the potential global impact of the report’s findings.

Jen Psaki, a State Department spokeswoman, said Mr. Kerry “called his former colleague to discuss the broader implications of the timing of the report’s release because a lot is going on in the world, and he wanted to make sure that foreign policy implications were being appropriately factored into timing.” She added, referring to the Islamic State extremist group, “These include our ongoing efforts against ISIL and the safety of Americans being held hostage around the world.”

The phone call between Mr. Kerry and Ms. Feinstein was first reported by Bloomberg View.

Josh Earnest, the White House spokesman, said the administration backed making the report public next week. “The president has long advocated the declassified release of this report, so we certainly welcome the news from the committee that they’re planning to do so next week,” Mr. Earnest said.

Some Democratic members of the Intelligence Committee said they saw no reason to delay the release of the report and noted that there has been a stream of objections to making it public.

“It is hardly surprising that there is an 11th-hour objection to releasing this vital report because there have been objections at every hour for quite some time,” said Senator Ron Wyden, Democrat of Oregon. “My own view is that many Americans will be deeply angered when they read this report about misdeeds and mistakes and out-and-out falsehoods. It is critically important that this report not be pushed under the rug, buried before the American people have a chance to see it.”