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CVE-2026-92390 is a file-overwrite protection bypass in curl's -J output-file handling. An HTTP 103 Early Hints response can bypass the no-clobber protection intended to prevent overwriting existing files when using server-suggested output filenames. A malicious server can exploit this behavior to cause an existing output file to be overwritten. The vulnerability is rated low severity by the curl project and is fixed in curl 8.23.0.
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No public exploit code observed for this vulnerability.
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Referenced by an Ubuntu local security check covering curl packages. No individual technical description or vulnerability-specific exploit availability is provided.
A vulnerability affecting Echo curl packages, rated High with a CVSS v3 base score of 7.5. The supplied vector indicates network-based exploitation without authentication or user interaction, with high integrity impact and no confidentiality or availability impact. The underlying flaw is not described. The prescribed fix is to update curl and its related packages to version 1:8.23.0-1+e1 or later.
An HTTP response-header and output-file handling flaw allows an HTTP 103 Early Hints response to bypass protection against overwriting an existing file when using curl's -J option.
Low-severity vulnerability in curl fixed in version 8.23.0. The article provides no technical details.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.