USN-8487-1: curl vulnerabilities

Andrew Nesbitt discovered that curl could reuse an existing live connection during STARTTLS-based connection upgrades even when the TLS configuration did not match. A remote attacker could possibly use this issue to cause curl to use an unintended TLS configuration. CVE-2026-8286 Muhamad Arga...

CVE-2026-54089

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Starting with 2.0.0-rc.1, when FileBrowser is configured with proxy authentication auth.method=proxy, any unauthenticated attacker who can reach the server...

GO-2026-5205 File Browser: Proxy auth auto-provisioned users inherit Execute permission and Commands in github.com/filebrowser/filebrowser

File Browser: Proxy auth auto-provisioned users inherit Execute permission and Commands in github.com/filebrowser/filebrowser...

CVE-2026-54089

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Starting with 2.0.0-rc.1, when FileBrowser is configured with proxy authentication auth.method=proxy, any unauthenticated attacker who can reach the server...

CVE-2026-54089

CVE-2026-54089 impacts File Browser when configured with proxy authentication (auth.method=proxy). The issue allows an unauthenticated attacker who can reach the server to impersonate any user—including an administrator—by sending a single forged HTTP header. No credentials are required. Addition...

PT-2026-52537

Name of the Vulnerable Software and Affected Versions File Browser versions 2.0.0-rc.1 and later Description When configured with proxy authentication auth.method=proxy, the software improperly trusts upstream identity headers without validating that requests originate from a trusted proxy. An...

User Impersonation

Overview Affected versions of this package are vulnerable to User Impersonation via the ENABLEREVERSEPROXYAUTHENTICATION process. An attacker can impersonate any user or trigger automatic account creation by forging the configured authentication header in client requests. This is only exploitable...

User Impersonation

Overview Affected versions of this package are vulnerable to User Impersonation via the ENABLEREVERSEPROXYAUTHENTICATION process. An attacker can impersonate any user or trigger automatic account creation by forging the configured authentication header in client requests. This is only exploitable...

CVE-2026-25119

Gogs is an open source self-hosted Git service. Prior to 0.14.3, when ENABLEREVERSEPROXYAUTHENTICATION is enabled, Gogs accepts the configured authentication header default: X-WEBAUTH-USER directly from client requests without validating that the request originated from a trusted reverse proxy. A...

CVE-2026-25119

Gogs is an open source self-hosted Git service. Prior to 0.14.3, when ENABLEREVERSEPROXYAUTHENTICATION is enabled, Gogs accepts the configured authentication header default: X-WEBAUTH-USER directly from client requests without validating that the request originated from a trusted reverse proxy. A...

CVE-2026-8927

When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests. Specifically, if the initial transfer authenticates against proxyA using Digest auth, a subsequent transfer routed...

UBUNTU-CVE-2026-8927

When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests. Specifically, if the initial transfer authenticates against proxyA using Digest auth, a subsequent transfer routed...

curl: Information disclosure due to uncleared proxy authentication state

A flaw was found in libcurl. When reusing a libcurl handle for sequential transfers with environment-variable proxy configuration, the library does not properly clear the proxy authentication state. This oversight can lead to the unintended disclosure of Proxy-Authorization headers to an incorrec...

PT-2026-51750

Name of the Vulnerable Software and Affected Versions libcurl affected versions not specified Description When reusing a handle for sequential transfers driven by environment-variable proxy configuration, the software fails to clear the proxy authentication state between requests. If an initial...

PT-2026-51752

Name of the Vulnerable Software and Affected Versions libcurl affected versions not specified Description A flaw exists where the software fails to clear proxy authentication credentials when instructed to do so. This results in old credentials remaining available and potentially being used for...

CVE-2026-55568 Guzzle: Silent HTTPS-Proxy Downgrade to Cleartext

Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, in certain configurations, traffic expected to be protected by TLS on the hop to the proxy is transmitted in cleartext. Proxy authentication credentials the Proxy-Authorization header, proxy userinfo in the proxy URL, or CURLOPTPROXYUSERPW...

PT-2026-51429

Name of the Vulnerable Software and Affected Versions Gogs versions prior to 0.14.3 Description When ENABLE REVERSE PROXY AUTHENTICATION is enabled, Gogs accepts the configured authentication header default: X-WEBAUTH-USER directly from client requests without validating that the request originat...

Authentication Bypass Using an Alternate Path or Channel

Overview litellm is a Library to easily interface with LLM API providers Affected versions of this package are vulnerable to Authentication Bypass Using an Alternate Path or Channel via exception handling in the MCP proxy authentication flow. An attacker can bypass authentication by supplying an...

guzzlehttp/guzzle: Silent HTTPS-Proxy Downgrade to Cleartext

Impact The built-in cURL handlers GuzzleHttp\Handler\CurlHandler and GuzzleHttp\Handler\CurlMultiHandler, used by default whenever the PHP cURL extension is available accept an https:// proxy — a proxy reached over a TLS-encrypted connection — through the proxy request option, client-level proxy...

MGASA-2026-0210 Updated putty packages fix security vulnerabilities

ECDSA signature verification can be made to fail an assertion. Server can provoke a double free in RSA KEX code. Telnet session data is marked with trust sigils after authenticating to a proxy. PuTTY Ed25519 Signature ecc-ssh.c eddsaverify signature verification. CVE-2026-4115...