Direct proof of use
The RPG-26 appears in the 2014 Yemen Civil War record as captured or inadvertently supplied materiel rather than as a confirmed fired weapon. The Center for Strategic and International Studies summarized UN reporting that Arab coalition aircraft accidentally air-dropped RPG-26-family weapons into Houthi-controlled territory in April 2015, after which Houthi fighters seized the shipment.
The underlying UN Panel of Experts reporting is the direct conflict source. The Security Council sanctions reports page lists the Panel's 2016 Yemen report, and CSIS cites that report for weapons with characteristics similar to the RPG-26 being dropped into Houthi-controlled territory and photographed with a note addressed to King Salman.
Sources: The Missile War in Yemen, UN Yemen Panel Reports
Timeline
In April 2015, shortly after the Saudi-led coalition entered the war, a coalition airdrop went to Houthi-controlled territory rather than to intended anti-Houthi recipients. CSIS describes Houthi fighters seizing RPG-26 variants from that shipment and reproduces the UN-attributed image caption identifying an RPG-26 variant inadvertently air-dropped to Houthi forces.
Later public summaries continued to treat the incident as an acquisition pathway for Houthi forces, not as proof of a specific RPG-26 firing. The documented role is therefore capture and conflict possession by Houthi-aligned forces.
Sources: The Missile War in Yemen, UN Yemen Panel Reports
Narrative
The RPG-26 is a Soviet/Russian disposable 72.5 mm anti-tank rocket launcher. In Yemen, the documented incident fits a broader pattern in which Houthi-aligned forces drew on captured state stocks, battlefield seizures, smuggling, and accidental losses by their opponents, but the RPG-26 evidence is narrower than the evidence for more commonly filmed Houthi anti-tank weapons.
CSIS separates the RPG-26 entry from more heavily documented systems such as RPG-7 launchers and C90-CR weapons. Its account says the RPG-26-family weapons were captured from an accidental coalition airdrop; it does not identify a named battle, target, or firing incident involving the RPG-26.
Sources: The Missile War in Yemen, RPG-26