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CVE-2026-34931 is an open redirect vulnerability in Hoppscotch, an open source API development ecosystem, affecting versions prior to 2026.3.0. The flaw allows an attacker to abuse redirect behavior to cause authentication or session tokens to be sent to an attacker-controlled destination. Those exfiltrated tokens can then be used to authenticate as the victim. Based on the provided information, the issue results in account takeover and was fixed in Hoppscotch version 2026.3.0.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.