The Central Board of Secondary Education (CBSE) on Tuesday, 26 May 2026, firmly rejected claims by a social media user who alleged that the On Screen Marking (OSM) evaluation portal had been compromised, stating that no security breaches have come to light on the platform used for actual answer-book evaluation. The Board issued a formal clarification, calling the viral claim misleading and urging students not to be alarmed.

What CBSE Said About the Alleged Breach

In a post on X, the CBSE addressed the user's claim directly, noting that the URL cited — http://cbse.onmarks.co.in — is a testing site containing only sample data for internal review, and holds no actual evaluation data, marks, or student records. The Board stated that the portal actually deployed for evaluation carries a different URL and has neither been compromised nor carries the vulnerabilities described in the social media post.

'The Board emphasises that no security breaches have come to light on the Portal deployed for the actual evaluation work,' the CBSE said in its statement. The clarification also noted that the OSM system was built with strong grievance redressal mechanisms and enhanced transparency safeguards.

Congress Flags Broader OSM Glitches, Writes to PM Modi

The denial came on a day of heightened political pressure over the OSM rollout. Congress General Secretary K.C. Venugopal wrote to Prime Minister Narendra Modi, highlighting what he described as 'discrepancies' arising from the digital evaluation system for Class 10 and 12 board examinations, and demanded a one-time redressal for affected students.

In a post on X, Venugopal said, 'A government that cannot manage a simple secondary education exam, let alone cause the disastrous NEET fiasco, has no right to make tall claims of being a ‘Vishwaguru’.' He added that 'the CBSE results have been a complete mess, with the digital scanning and evaluation system causing widespread panic among students because of the thousands of errors that have come to light,' and criticised the Board for 'arbitrarily charging exorbitant re-evaluation fees from these helpless students.'

The OSM System and Its Controversies

The On Screen Marking system was introduced by CBSE to digitise the evaluation of answer books, replacing the traditional physical-paper model. While the Board has positioned it as a transparency and efficiency upgrade, the rollout has reportedly been dogged by glitches that have triggered anxiety among lakhs of students awaiting results. This comes amid a broader national conversation about examination integrity following the NEET controversy in 2024.

Notably, the CBSE's clarification draws a sharp distinction between a publicly accessible testing URL and the secured production portal — a technical nuance that may not be immediately apparent to students or parents who encountered the viral claim.

What Happens Next

The Board has reassured all stakeholders that the integrity of the evaluation process remains intact. However, the Congress letter to the Prime Minister signals that parliamentary scrutiny of the OSM rollout is likely to intensify. Students and parents are advised to rely only on official CBSE communications for result-related information.