PT-2026-40985 · Julia · Curl Jll+1

Published

2026-05-04

·

Updated

2026-05-04

None

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The curl URL parser wrongly accepts percent-encoded URL separators like '/'when decoding the host name part of a URL, making it a different URL usingthe wrong host name when it is later retrieved.For example, a URL like http://example.com%2F127.0.0.1/, would be allowed bythe parser and get transposed into http://example.com/127.0.0.1/. This flawcan be used to circumvent filters, checks and more.
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Related Identifiers

JLSEC-2026-389

Affected Products

Curl Jll
Libcurl Jll