CVE-2026-40017

An attacker that can send mail to a user can craft a message header whose values are chosen to collide in an internal hash table, which makes the IMAP THREAD command consume CPU disproportionate to the size of the message. This is a separate issue from CVE-2026-40014 and is not addressed by that...

CVE-2026-27852

An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes excessive memory usage when the message is later parsed. The message is still delivered, but reading it over IMAP can exhaust the memory limit...

CVE-2026-40017

Dovecot (per Open-Xchange advisory) is vulnerable to a hash-table collision in the IMAP THREAD command: an attacker who can send mail to a user can craft message header values that collide in an internal hash table, causing the THREAD command to consume CPU disproportionate to message size , lead...

CVE-2026-40017

An attacker that can send mail to a user can craft a message header whose values are chosen to collide in an internal hash table, which makes the IMAP THREAD command consume CPU disproportionate to the size of the message. This is a separate issue from CVE-2026-40014 and is not addressed by that...

CVE-2026-27852

An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes excessive memory usage when the message is later parsed. The message is still delivered, but reading it over IMAP can exhaust the memory limit...

Astra Linux – Vulnerability in Ruby-Rack

Rack is a modular Ruby web server interface. Carefully crafted headers may cause header parsing in Rack to take longer than expected, potentially leading to a denial-of-service issue. The Accept and Forwarded headers are affected. Ruby 3.2 includes fixes for this problem, so Rack applications tha...

netty: io.netty/netty-codec-http: Netty: Denial of Service via SPDY header decompression amplification

A flaw was found in Netty, a network application framework. A remote attacker could exploit a vulnerability in the SPDY header decoding process. By sending a specially crafted, small compressed header block, the attacker can cause it to expand significantly during decompression, leading to...

Cloudreve: Denial of Service - Image decompression / pixel bomb in thumbnail & avatar decoding crashes the server

Summary Cloudreve's built-in image processor decodes user-supplied images with Go's standard-library decoders image/png, image/jpeg, image/gif and guards only the compressed file size — never the decoded pixel dimensions. Go's decoders allocate a pixel buffer sized bytesPerPixel × width × height...

Oracle Linux 10 : nginx (ELSA-2026-19159)

The remote Oracle Linux 10 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-19159 advisory. - Resolves: RHEL-188402 - nginx: NGINX: Arbitrary code execution or. Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers CVE-2026-420...

nginx security update

1.26.3-6.0.1.el102.5 - Reference oracle-indexhtml within Requires Orabug: 33802044 2:1.26.3-6.5 - Resolves: RHEL-191778 - nginx: 'HTTP/2 bomb' nginx fix breaks module ABI causing crashes - Resolves: RHEL-188402 - nginx: NGINX: Arbitrary code execution or. Denial of Service via heap-based buffer...

netty-codec-haproxy: Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers

A flaw was found in the Netty HAProxy PROXY protocol v2 codec. A remote attacker can exploit this vulnerability by sending a specially crafted HAProxy PROXY protocol v2 header with nested PP2TYPESSL type-length-value TLV records. This can lead to a memory leak, causing the underlying cumulation...

nginx: NGINX: Arbitrary code execution or Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers

A flaw was found in NGINX. When NGINX is configured to proxy HTTP/2 traffic using the ngxhttpproxyv2module or ngxhttpgrpcmodule with specific settings, a remote, unauthenticated attacker can send specially crafted large headers. This can trigger a heap-based buffer overflow, leading to a restart ...

ROS-20260707-73-0037

The vulnerability of the Go programming language’s MIME component is related to its algorithmic complexity. Exploiting this vulnerability can allow a malicious actor, operating remotely, to cause service failures by using a specially created MIME header...

Improperly Controlled Modification of Dynamically-Determined Object Attributes

Overview Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes in the filter process. An attacker can bypass intended security restrictions by supplying specially crafted argument headers that are not properly validated...

Improperly Controlled Modification of Dynamically-Determined Object Attributes

Overview Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes in the filter process. An attacker can bypass intended security restrictions by supplying specially crafted argument headers that are not properly validated...

Improperly Controlled Modification of Dynamically-Determined Object Attributes

Overview Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes in the filter process. An attacker can bypass intended security restrictions by supplying specially crafted argument headers that are not properly validated...

DEBIAN-CVE-2026-58058

Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6getdataprimitive libnetutil/netutil.cc, so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a craft...

mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header

A flaw was found in the Golang MIME Multipurpose Internet Mail Extensions package. A remote attacker could exploit this vulnerability by sending a maliciously-crafted MIME header containing many invalid encoded-words. This could lead to excessive CPU consumption, resulting in a Denial of Service...

SUSE-SU-2026:2487-1 Security update for rmt-server

This update for rmt-server fixes the following issues - CVE-2026-26961: rack: mismatch in header handling can allow to smuggle multipart content bsc1261398. - CVE-2026-26962: rack: improper unfolding of folded multipart headers can lead to header injection or response splitting bsc1261471. -...

netty-codec-haproxy: Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers

A flaw was found in the Netty HAProxy PROXY protocol v2 codec. A remote attacker can exploit this vulnerability by sending a specially crafted HAProxy PROXY protocol v2 header with nested PP2TYPESSL type-length-value TLV records. This can lead to a memory leak, causing the underlying cumulation...