Http
Monthly
Unbounded response-header buffering in ReactPHP's HTTP client (react/http) versions 1.0.0 through 1.11.0 allows a malicious or compromised remote server to exhaust the PHP memory_limit of an application that uses React\Http\Browser to fetch attacker-influenced URLs. Because CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H rates this 7.5, the impact is availability-only (event-loop or worker process crash), with no confidentiality or integrity effect; there is no public exploit identified at time of analysis and the issue is not in CISA KEV. The vendor-released patch is version 1.11.1, which enforces a 65536-byte response-header cap and raises an OverflowException when exceeded.
Remote, unauthenticated denial of service affects react/http versions 0.6.0 through 1.11.0, where a malformed Transfer-Encoding: chunked body can trap React\Http\Io\ChunkedDecoder in a non-terminating loop; because ReactPHP is single-threaded and event-loop driven, one looping body halts the entire process rather than a single request. The decoder is used for inbound request bodies in React\Http\HttpServer and outbound response bodies in React\Http\Browser, so a malicious client can freeze a server and a malicious or compromised upstream server can freeze a client. No public exploit identified at time of analysis; a vendor-released patch exists in version 1.11.1.
Credential leakage in the Perl HTTP::Tiny client (all versions before 0.095) lets an attacker who controls a redirect destination harvest sensitive headers. When a server answers with a 3xx redirect, HTTP::Tiny re-sends caller-supplied Authorization, Cookie and Proxy-Authorization headers to the new host without verifying it shares the original origin, including across scheme, host or port boundaries and over https-to-http downgrades that expose them in cleartext on the wire. No public exploit is identified at time of analysis and CISA SSVC rates exploitation as none, but the flaw is well-documented and a vendor patch is available in 0.095.
HTTP::Session versions through 0.53 for Perl defaults to using insecurely generated session ids.
Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resources by rapidly opening and immediately canceling (RST_STREAM) large numbers of streams over a single connection, a technique dubbed the 'Rapid Reset' attack. The flaw is confirmed actively exploited (CISA KEV) following large-scale weaponization observed August through October 2023, with publicly available exploit code and an EPSS score of 94.45% placing it in the 100th percentile for likelihood of exploitation. Virtually every major HTTP/2 stack - including nghttp2, Netty, Envoy, and Eclipse Jetty - is affected.
HTTP::Tiny versions before 0.093 for Perl fail to validate carriage return and line feed (CRLF) characters in HTTP request lines and header values, allowing attackers who control input URLs or headers to inject additional HTTP headers and smuggle requests to upstream servers. Remote unauthenticated attackers can exploit this via crafted URLs passed to webhook or URL fetch endpoints, achieving limited information disclosure and integrity compromise. EPSS score of 0.03% (percentile 7%) indicates low practical exploitation probability despite network-vector accessibility.
HTTP::Session2 versions through 1.09 for Perl does not validate the format of user provided session ids, enabling code injection or other impact depending on session backend. [CVSS 6.5 MEDIUM]
HTTP::Session2 before version 1.12 for Perl generates predictable session identifiers on Windows systems when /dev/urandom is unavailable, falling back to weak randomization using rand() combined with guessable values like PID and epoch time. An attacker could predict valid session IDs to hijack user sessions, as SHA-1 hashing of these weak inputs provides insufficient cryptographic protection. This affects Perl applications using HTTP::Session2 on Windows platforms where secure random sources are not accessible.
react/http is an event-driven, streaming HTTP client and server implementation for ReactPHP. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
HTTP::Tiny before 0.083, a Perl core module since 5.13.9 and available standalone on CPAN, has an insecure default TLS configuration where users must opt in to verify certificates. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required.
ReactPHP HTTP is a streaming HTTP client and server implementation for ReactPHP. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
HTTP::Daemon is a simple http server class written in perl. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in the http package through 0.12.2 for Dart. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in the http crate before 0.1.20 for Rust. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Unbounded response-header buffering in ReactPHP's HTTP client (react/http) versions 1.0.0 through 1.11.0 allows a malicious or compromised remote server to exhaust the PHP memory_limit of an application that uses React\Http\Browser to fetch attacker-influenced URLs. Because CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H rates this 7.5, the impact is availability-only (event-loop or worker process crash), with no confidentiality or integrity effect; there is no public exploit identified at time of analysis and the issue is not in CISA KEV. The vendor-released patch is version 1.11.1, which enforces a 65536-byte response-header cap and raises an OverflowException when exceeded.
Remote, unauthenticated denial of service affects react/http versions 0.6.0 through 1.11.0, where a malformed Transfer-Encoding: chunked body can trap React\Http\Io\ChunkedDecoder in a non-terminating loop; because ReactPHP is single-threaded and event-loop driven, one looping body halts the entire process rather than a single request. The decoder is used for inbound request bodies in React\Http\HttpServer and outbound response bodies in React\Http\Browser, so a malicious client can freeze a server and a malicious or compromised upstream server can freeze a client. No public exploit identified at time of analysis; a vendor-released patch exists in version 1.11.1.
Credential leakage in the Perl HTTP::Tiny client (all versions before 0.095) lets an attacker who controls a redirect destination harvest sensitive headers. When a server answers with a 3xx redirect, HTTP::Tiny re-sends caller-supplied Authorization, Cookie and Proxy-Authorization headers to the new host without verifying it shares the original origin, including across scheme, host or port boundaries and over https-to-http downgrades that expose them in cleartext on the wire. No public exploit is identified at time of analysis and CISA SSVC rates exploitation as none, but the flaw is well-documented and a vendor patch is available in 0.095.
HTTP::Session versions through 0.53 for Perl defaults to using insecurely generated session ids.
Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resources by rapidly opening and immediately canceling (RST_STREAM) large numbers of streams over a single connection, a technique dubbed the 'Rapid Reset' attack. The flaw is confirmed actively exploited (CISA KEV) following large-scale weaponization observed August through October 2023, with publicly available exploit code and an EPSS score of 94.45% placing it in the 100th percentile for likelihood of exploitation. Virtually every major HTTP/2 stack - including nghttp2, Netty, Envoy, and Eclipse Jetty - is affected.
HTTP::Tiny versions before 0.093 for Perl fail to validate carriage return and line feed (CRLF) characters in HTTP request lines and header values, allowing attackers who control input URLs or headers to inject additional HTTP headers and smuggle requests to upstream servers. Remote unauthenticated attackers can exploit this via crafted URLs passed to webhook or URL fetch endpoints, achieving limited information disclosure and integrity compromise. EPSS score of 0.03% (percentile 7%) indicates low practical exploitation probability despite network-vector accessibility.
HTTP::Session2 versions through 1.09 for Perl does not validate the format of user provided session ids, enabling code injection or other impact depending on session backend. [CVSS 6.5 MEDIUM]
HTTP::Session2 before version 1.12 for Perl generates predictable session identifiers on Windows systems when /dev/urandom is unavailable, falling back to weak randomization using rand() combined with guessable values like PID and epoch time. An attacker could predict valid session IDs to hijack user sessions, as SHA-1 hashing of these weak inputs provides insufficient cryptographic protection. This affects Perl applications using HTTP::Session2 on Windows platforms where secure random sources are not accessible.
react/http is an event-driven, streaming HTTP client and server implementation for ReactPHP. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
HTTP::Tiny before 0.083, a Perl core module since 5.13.9 and available standalone on CPAN, has an insecure default TLS configuration where users must opt in to verify certificates. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required.
ReactPHP HTTP is a streaming HTTP client and server implementation for ReactPHP. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
HTTP::Daemon is a simple http server class written in perl. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in the http package through 0.12.2 for Dart. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in the http crate before 0.1.20 for Rust. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.