Russian Oil Flows Resume to Hungary, Slovakia via Ukraine, Unblocking Critical EU Aid

Kyiv, Ukraine – April 22, 2026 – After a months-long disruption stemming from alleged Russian attacks and a subsequent geopolitical standoff, Russian oil has reportedly begun flowing once again through the crucial Druzhba pipeline to Hungary and Slovakia. The restart, confirmed by Ukrainian President Volodymyr Zelenskyy, follows the completion of repairs on a section of the pipeline in Ukraine and is intricately linked to the anticipated release of a €90 billion European Union financial aid package for Kyiv. This development marks a significant, albeit fragile, resolution in a dispute that underscored the complex web of energy dependence and wartime diplomacy.

The interruption of oil supplies in late January, which Ukraine attributed to a Russian strike on its territory, plunged Hungary and Slovakia into an energy supply crisis. Both landlocked nations are heavily reliant on the southern leg of the Soviet-era Druzhba pipeline for their crude oil imports, with reports indicating that 86% to 92% of Hungary's oil and nearly all of Slovakia's supply arriving via this route. The cessation of flows quickly escalated into a diplomatic imbroglio, as Budapest and Bratislava accused Kyiv of intentionally delaying repairs to exert political pressure, claims vehemently denied by Ukraine. This friction notably manifested in Hungary's refusal to approve a substantial EU loan for Ukraine, setting the stage for a high-stakes negotiation.

The Geopolitical Chessboard of Energy

The Druzhba, or "Friendship," pipeline, one of the world's longest oil networks, has been a central artery for Russian and Kazakh oil to Central and Eastern Europe since its inception in 1964. Traversing over 4,000 kilometers from Russia, its southern branch runs through Ukraine, supplying not only Hungary and Slovakia but also the Czech Republic. While other European nations have significantly reduced their reliance on Russian energy following the full-scale invasion of Ukraine, Hungary and Slovakia have maintained their imports, benefiting from exemptions to EU sanctions due to their geographical constraints and infrastructure. This continued dependence has often placed them at odds with broader European efforts to isolate Russia economically.

The recent halt in flows quickly exposed the vulnerabilities inherent in this reliance. Ukrainian authorities reported that a Russian attack on pipeline infrastructure in late January 2026 led to the suspension of deliveries, causing immediate concern for Hungary and Slovakia. Slovakia even declared a state of emergency in its oil sector within weeks, highlighting the critical nature of the supply. The subsequent political deadlock over the €90 billion EU aid package underscored the immense leverage held by countries like Hungary in matters of European consensus, particularly when their national energy security is perceived to be at risk. Outgoing Hungarian Prime Minister Viktor Orbán had explicitly linked the unblocking of the loan to the resumption of oil deliveries, and his recent electoral defeat appears to have paved the way for a resolution.

Repair and Resumption: A Race Against Time

According to President Zelenskyy's announcement on April 21, Ukrainian specialists completed the necessary repairs to the damaged section of the Druzhba pipeline, ensuring the basic conditions for restoring its operation. Kyiv officials indicated that oil transit was expected to resume "within a few hours" on Wednesday, April 22, with Hungarian energy giant MOL having already requested the shipment of approximately 100,000 tonnes of oil to Hungary and Slovakia. Slovak Economy Minister Denisa Sakova also confirmed expectations for crude oil supplies to resume by Thursday morning.

The speed of the repairs and the resumption of flows were undoubtedly influenced by the intense diplomatic pressure and the potential for a breakthrough on the EU financial package. European Council President António Costa publicly thanked Zelenskyy for "delivering, as agreed," reinforcing the perceived quid pro quo nature of the situation. While the immediate crisis seems to have been averted, the incident serves as a stark reminder of the pipeline's dual role as both a vital energy artery and a strategic flashpoint in the ongoing conflict.

Persistent Challenges and Future Uncertainties

Despite the positive resolution, the longer-term outlook for energy security in the region remains fraught with challenges. President Zelenskyy, while announcing the restart, cautioned that "no one can currently guarantee that Russia will not repeat attacks on the pipeline infrastructure." This highlights the inherent fragility of relying on infrastructure that traverses a war zone and remains a potential target. The broader European objective of weaning itself off Russian energy imports continues, with the EU aiming to end all Russian gas imports by the autumn of 2027. However, for countries like Hungary and Slovakia, complete energy diversification presents a formidable and costly undertaking, one that they have consistently resisted.

Furthermore, the issue of transit fees has historically been a point of contention between Russia and Ukraine. In the past, Ukraine has increased transit fees for oil shipments through the Druzhba pipeline, reflecting the economic value of its role as a transit country. The current agreement for Russian gas transit through Ukraine is set to expire at the end of 2024, raising further questions about future energy flows and potential disputes. The restart of oil supplies through the Druzhba pipeline offers immediate relief to Hungary and Slovakia and facilitates the crucial EU financial support for Ukraine. However, it simultaneously underscores the enduring complexities of energy politics, wartime vulnerabilities, and the delicate balance of interests within the European Union.