CLSA-2026-1777463367 curl: Fix of CVE-2023-27533

CVE-2023-27533: telnet: only accept option arguments in ascii...

CVE-2026-6253

curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the following conditions are true: 1. curl is setup to use specific different proxies for different URL schemes 2. the first proxy needs credentials 3. the second proxy uses no credentials 4. whil...

UBUNTU-CVE-2026-6253

curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the following conditions are true: 1. curl is setup to use specific different proxies for different URL schemes 2. the first proxy needs credentials 3. the second proxy uses no credentials 4. whil...

CVE-2026-5773

libcurl might in some circumstances reuse the wrong connection for SMBS transfers. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criteria must be met. Due to a logical error in the...

Malicious code in apple-cloud-infrastructure-monitor (npm)

Malicious npm package published by threat actor "raya4321" as part of a coordinated typosquatting campaign impersonating Apple internal infrastructure services authentication, PKI, telemetry, CloudKit, and cloud infrastructure. All packages in this campaign execute credential-theft payloads durin...

Malicious code in apple-coredata-internal-service (npm)

Malicious npm package published by threat actor "raya4321" as part of a coordinated typosquatting campaign impersonating Apple internal infrastructure services authentication, PKI, telemetry, CloudKit, and cloud infrastructure. All packages in this campaign execute credential-theft payloads durin...

CURL-CVE-2026-5545 wrong reuse of HTTP Negotiate connection

libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTPS request after a Negotiate-authenticated one, when both use the same host. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid...

proxy credentials leak over redirect-to proxy

curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the following conditions are true: 1. curl is setup to use specific different proxies for different URL schemes 2. the first proxy needs credentials 3. the second proxy uses no credentials 4. whil...

wrong reuse of HTTP Negotiate connection

libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTPS request after a Negotiate-authenticated one, when both use the same host. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid...

OCSP stapling bypass with Apple SecTrust

When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine...

CURL-CVE-2026-6253 proxy credentials leak over redirect-to proxy

curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the following conditions are true: 1. curl is setup to use specific different proxies for different URL schemes 2. the first proxy needs credentials 3. the second proxy uses no credentials 4. whil...

MAL-2026-3159 Malicious code in apple-internal-pki-trust-v5 (npm)

Malicious npm package published by threat actor "raya4321" as part of a coordinated typosquatting campaign impersonating Apple internal infrastructure services authentication, PKI, telemetry, CloudKit, and cloud infrastructure. All packages in this campaign execute credential-theft payloads durin...

curl: MQTT state machine confusion: PINGRESP/DISCONNECT with non-zero remaining_length dispatches to stale nextstate

Summary: In lib/mqtt.c, the state machine in mqttdoing lines 894-911 in curl 8.20.0 does not validate that PINGRESP 0xD0 and DISCONNECT 0xE0 packets have remaininglength == 0 as required by MQTT 3.1.1 spec sections 3.13.1 and 3.14.1. A malicious broker can send a PINGRESP fixed header with non-ze...

Origin Validation Error

Overview Affected versions of this package are vulnerable to Origin Validation Error via the reuse of an easy handle in HTTP requests when a custom Host: header is set for the initial request and omitted in a subsequent one. An attacker can obtain cookies intended for a different host by exploiti...

Linux Distros Unpatched Vulnerability : CVE-2026-5773

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libcurl might in some circumstances reuse the wrong connection for SMBS transfers. libcurl features a pool of recent connections so that subsequent requests can...

Linux Distros Unpatched Vulnerability : CVE-2026-4873

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial...

PT-2026-35894

Name of the Vulnerable Software and Affected Versions curl affected versions not specified Description curl may erroneously pass credentials intended for a first proxy to a second proxy. This occurs when curl is configured to use different proxies for different URL schemes, the first proxy requir...

Linux Distros Unpatched Vulnerability : CVE-2026-6253

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the following conditions are true: 1. curl is setup to use...

Cleartext Transmission of Sensitive Information

Overview Affected versions of this package are vulnerable to Cleartext Transmission of Sensitive Information due to the incorrect reuse of an unencrypted connection for a subsequent request that expects TLS. An attacker can intercept sensitive information if the second connection is done to the...

Linux Distros Unpatched Vulnerability : CVE-2026-6429

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - When asked to both use a .netrc file for credentials and to follow HTTP redirects, libcurl could leak the password used for the first host to the followed-to ho...