CLSA-2026-1777878036 curl: Fix of 2 CVEs

CVE-2019-5436: tftp: use the current blksize for recvfrom - CVE-2016-8615: cookie: replace use of fgets with custom version...

OPENSUSE-SU-2026:10674-1 curl-8.20.0-1.1 on GA media

These are all security issues fixed in the curl-8.20.0-1.1 package on the GA media of openSUSE Tumbleweed...

curl: wcurl treats some URL operands after -- as curl options

I found that wcurl does not always keep operands after -- in a pure URL-data context. The documented way to pass curl options through wcurl is --curl-options, but a value supplied as a URL operand can still reach the final curl command as an option, for example wcurl -- "--url=file:///...". A...

Moderate: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: curl: curl-8.20.0-0.1.hum1 aarch64, x8664 libcurl-8.20.0-0.1.hum1 aarch64, x8664 libcurl-devel-8.20.0-0.1.hum1 aarch64, x8664 libcurl-minimal-8.20.0-0.1.hum1 aarch64, x8664 curl-8.20.0-0.1.hum1.s...

curl: curl: Proxy credential disclosure via redirects to unauthenticated proxies

A flaw was found in curl. When curl is configured to use distinct proxies for different URL schemes, a redirect from a URL using an authenticated proxy to one using an unauthenticated proxy can inadvertently expose the initial proxy's credentials. This improper credential management CWE-522 may...

curl: curl: Information disclosure due to incorrect TLS connection reuse

A flaw was found in curl. A remote attacker could exploit this by initiating an unencrypted connection via IMAP, SMTP, or POP3 and then making a subsequent request to the same host that requires Transport Layer Security TLS. Due to incorrect connection reuse, the subsequent request would bypass t...

curl: libcurl 8.20.0 incomplete fix for CVE-2026-7168: changing only CURLOPT_PROXYPORT leaks stale Proxy Digest auth to a different proxy

Summary: I found an incomplete-fix variant of CVE-2026-7168 in curl 8.20.0. The 8.20.0 fix clears state.proxydigest / state.authproxy when CURLOPTPROXY changes, but not when only CURLOPTPROXYPORT changes. On the same easy handle, request 1 through proxyA CURLOPTPROXYPORT=18197 learns Proxy Digest...

Curl 7.14.1 < 8.20.0 Proxy Credential Disclosure

The version of curl installed on the remote host is 7.14.1 prior to 8.20.0. It is, therefore, affected by a proxy credential disclosure vulnerability: - curl might erroneously pass on credentials for a first proxy to a second proxy. This flaw occurs when different proxies are configured for...

Curl 7.10.6 < 8.20.0 Wrong Reuse of HTTP Negotiate Connection

The version of curl installed on the remote host is 7.10.6 prior to 8.20.0. It is, therefore, affected by an authentication bypass vulnerability: - libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTPS request after a Negotiate-authenticated one,...

Curl 8.17.0 < 8.20.0 OCSP Stapling Bypass

The version of curl installed on the remote host is 8.17.0 prior to 8.20.0. It is, therefore, affected by an OCSP stapling bypass vulnerability: - 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...

Curl 7.40.0 < 8.20.0 Wrong SMB Connection Reuse

The version of curl installed on the remote host is 7.40.0 prior to 8.20.0. It is, therefore, affected by a wrong SMB connection reuse vulnerability: - libcurl might in some circumstances reuse the wrong connection for SMBS transfers. The code erroneously did not consider the share name as a...

CVE-2026-6253

A flaw was found in curl. When curl is configured to use distinct proxies for different URL schemes, a redirect from a URL using an authenticated proxy to one using an unauthenticated proxy can inadvertently expose the initial proxy's credentials. This improper credential management CWE-522 may...

CVE-2026-4873

A flaw was found in curl. A remote attacker could exploit this by initiating an unencrypted connection via IMAP, SMTP, or POP3 and then making a subsequent request to the same host that requires Transport Layer Security TLS. Due to incorrect connection reuse, the subsequent request would bypass t...

Important Photon OS Security Update - PHSA-2026-5.0-0838

Updates of 'curl' packages of Photon OS have been released...

CLSA-2026-1777463593 curl: Fix of CVE-2023-27533

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

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-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...