curl OAuth2 Bearer Token Leak on Cross-Protocol Redirect
CVE-2025-14524 is a credential leakage vulnerability in curl/libcurl. When an HTTP or HTTPS transfer uses an OAuth2 bearer token and follows a cross-protocol redirect to a second URL using the IMAP, LDAP, POP3, or SMTP scheme, curl may incorrectly forward the bearer token to the redirected target host. According to the provided content, the issue affects curl versions 7.33.0 through 8.17.0 and impacts both the curl command-line tool and applications using libcurl. The flaw is triggered in redirect-handling logic during protocol changes and can result in the Authorization bearer credential being sent over an unintended connection.
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Impact
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Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
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A curl vulnerability that may cause unintended transmission of sensitive data over incorrect connections.
A third-party curl vulnerability that may unintentionally send sensitive information via an incorrect connection.
A curl open source vulnerability affecting Apple software on macOS Sequoia that may result in unintentionally sending sensitive information via an incorrect connection.
The version that knows your environment.
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.