Vancouver, British Columbia--(Newsfile Corp. - August 5, 2026) - Defiance Silver Corp. (TSXV: DEF) (FSE: D4E) (WKN: A1JQW5) ("Defiance" or the "Company") is pleased to announce that Mexico's Secretariat of Environment and Natural Resources ("SEMARNAT") has approved the Company's Informe Preventivo for the Espiritu target at its Green Earth Project in Sonora, Mexico.

The approved Informe Preventivo constitutes the environmental authorization required to conduct exploration drilling in accordance with applicable Mexican environmental regulations. The authorization permits exploration activities for a period of approximately 60 months, including the construction of up to 172 drill platforms and related access roads, subject to the terms and conditions set forth by SEMARNAT.

The Company submitted the Informe Preventivo as part of its commitment to conducting exploration activities in accordance with applicable environmental standards and regulatory requirements. Defiance acknowledges the efforts of SEMARNAT and the Company's technical and environmental consultants throughout the permitting process.

Chris Wright, Chairman and CEO of Defiance Silver Corp., commented:
"This approval is a significant step forward for the Green Earth Project as we continue to advance our portfolio. Our focus remains on generating new discoveries, unlocking the potential of our assets, and creating long-term value for shareholders. We look forward to commencing the work program and building on the momentum we have established across our projects."

About Defiance Silver Corp.

Defiance Silver Corp. (TSXV: DEF) (OTCQX: DNCVF) (FSE: D4E) is an exploration company advancing the district-scale Zacatecas project, located in the historic Zacatecas Silver District, the 100% owned Tepal Gold/Copper Project in Michoacán state, Mexico and the newly acquired Green Earth Metals property portfolio in Sonora State. Defiance is managed by a team of proven mine developers with a track record of exploring, advancing, and developing several operating mines and advanced resource projects. Defiance Silver's corporate mandate is to advance its projects through capital-efficient exploration focused on resource growth and new mineral discoveries.

On behalf of Defiance Silver Corp.
"Chris Wright"
Chairman of the Board

‍For more information, please contact:

Qualified Person Statement
Mr. George Cavey, P. Geo, a director and officer of the Company, is a Qualified Person within the meaning of National Instrument 43-101 and has approved the technical information concerning the Company's material mineral properties contained in this press release.

‍Disclaimer
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Caution Regarding Forward-Looking Information
Information contained in this news release which are not statements of historical facts may be "forward-looking information" for the purposes of Canadian securities laws. Such forward-looking information involves risks, uncertainties and other factors that could cause actual results, performance, prospects, and opportunities to differ materially from those expressed or implied by such forward looking information. The words "believe", "expect", "anticipate", "contemplate", "plan", "intends", "continue", "budget", "estimate", "may", "will", "schedule", "understand" and similar expressions identify forward-looking information. These forward-looking statements relate to, among other things: the Company's expectations regarding the ability of the Mining Bureau of Mexico City to reinstate ownership of the concessions to the Company, cooperation with the Mining Bureau relating to such reinstatement and the potential for any successful solution resulting therefrom.

Forward-looking information is necessarily based upon a number of estimates and assumptions that, while considered reasonable by Defiance, are inherently subject to significant technical, political, business, economic and competitive uncertainties, and contingencies. Known and unknown factors could cause actual results to differ materially from those projected in the forward-looking information. Factors and assumptions that could cause actual results or events to differ materially from current expectations include, among other things: the inability of the Company to regain possession of its concessions; political risks associated with the Company's operations in Mexico; the failure of the Mining Bureau in Mexico City to take any coercive action to reinstate ownership of the concessions to the Company; and the inability of the Company and its subsidiaries to enforce their legal rights in certain circumstances. For additional risk factors, please see the Company's most recently filed Management Discussions & Analysis for its quarter ended March 31, 2026, available on SEDAR at www.sedarplus.ca.

There can be no assurances that forward-looking information and statements will prove to be accurate, as many factors and future events, both known and unknown could cause actual results, performance, or achievements to vary or differ materially from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements contained herein or incorporated by reference. Accordingly, all such factors should be considered carefully when making decisions with respect to Defiance, and prospective investors should not place undue reliance on forward looking information. Forward-looking information in this news release is made as at the date hereof. The Company assumes no obligation to update or revise forward-looking information to reflect changes in assumptions, changes in circumstances or any other events affecting such forward-looking information, except as required by applicable law.

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