CVE-2026-23538

Feast: resource exhaustion via websocket endpoint

A vulnerability was identified in the Feast Feature Server's `/ws/chat` endpoint that allows remote attackers to establish persistent WebSocket connections without any authentication. By opening a large number of simultaneous connections, an attacker can exhaust server resources—such as memory, CPU, and file descriptors—leading to a complete denial of service for legitimate users.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Openshift Ai

CVE-2026-21729

Loki detected_fields query limits results in unbounded memory allocation

Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Grafana

Products

Loki

CVE-2026-14684

HdrHistogram AbstractHistogram.java memory allocation

A flaw has been found in HdrHistogram up to 2.2.2. This affects the function org.HdrHistogram.AbstractHistogram.decodeFromByteBuffer of the file src/main/java/org/HdrHistogram/AbstractHistogram.java. This manipulation of the argument numberOfSignificantValueDigits causes uncontrolled memory allocation. The attack can only be executed locally. The exploit has been published and may be used. The actual existence of this vulnerability is currently in question. This issue is disputed due to the potential lack of crossing of security boundaries and the pre-requisites for a successful attack.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Hdrhistogram

Products

Hdrhistogram

CVE-2026-14683

HdrHistogram AbstractHistogram.java memory allocation

A vulnerability was detected in HdrHistogram up to 2.2.2. Affected by this issue is the function org.HdrHistogram.AbstractHistogram.decodeFromCompressedByteBuffer of the file src/main/java/org/HdrHistogram/AbstractHistogram.java. The manipulation of the argument lengthOfCompressedContents results in uncontrolled memory allocation. The attack needs to be approached locally. The exploit is now public and may be used. It is still unclear if this vulnerability genuinely exists. This issue is disputed due to the potential lack of crossing of security boundaries and the pre-requisites for a successful attack.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Hdrhistogram

Products

Hdrhistogram

CVE-2026-59884

pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Pyasn1

Products

Pyasn1

CVE-2026-56375

ImageMagick - Memory Leak in ASHLAR Coder Action Failure

ImageMagick through 7.1.2-18 contains a memory leak vulnerability in the ASHLAR coder when an action fails. Attackers can trigger failed actions to exhaust memory resources and cause denial of service.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Imagemagick

Products

Imagemagick

CVE-2026-61869

ImageMagick before 7.1.2-26 Memory Leak in MIFF Encoder

ImageMagick before 7.1.2-26 and 6.9.13-51 contains a memory leak in the MIFF encoder that occurs when a memory allocation fails during MIFF image processing, which can lead to denial of service.

CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed

Vendors

Imagemagick

Products

Imagemagick

CVE-2026-59762

BIG-IP HTTP/2 vulnerability

When an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization.   Impact: System performance can degrade until the TMM process is either forced to restart or is manually restarted. This vulnerability allows a remote, unauthenticated attacker to cause a degradation of service that can lead to a denial-of-service (DoS) on the BIG-IP system. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

F5

Products

Big-ip Big-ip Next Cloud-native Network Functions Big-ip Next Cnf and 3 more

CVE-2026-47736

Puma PROXY Protocol v1 Parser Allows Remote Memory Exhaustion

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, when PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer while waiting for CRLF to determine whether a PROXY v1 line is present, allowing an attacker that continuously sends bytes without CRLF to cause unbounded in-process memory growth and additional CPU cost from repeatedly scanning the growing buffer. This issue is fixed in versions 7.2.1 and 8.0.2.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Puma

Products

Puma

CVE-2026-59886

pyasn1: Uncontrolled resource consumption when converting decoded REAL values

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the univ.Real type converted its mantissa, base, and exponent value to a Python float using exact big-integer exponentiation. A BER, CER, or DER encoded REAL value only a few bytes long can carry a very large exponent, causing float conversion through prettyPrint(), str(), comparison, arithmetic, int(), or an explicit float() call to consume excessive CPU and memory and hang applications that decode untrusted ASN.1 data and then print, log, or compare decoded objects. This issue is fixed in version 0.6.4.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Pyasn1

Products

Pyasn1

CVE-2026-46629

Twig: Unbounded formatter memoisation in twig/intl-extra keyed on template-controlled arguments

Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\Environment. This issue is fixed in version 3.26.0.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Symfony Twigphp

Products

Twig Twig

CVE-2026-60108

Zeek < 8.0.9 Uncontrolled Memory Consumption DoS via FTP Analyzer

Zeek before 8.0.9 contains an uncontrolled memory consumption vulnerability in the FTP analyzer that allows unauthenticated remote attackers to cause process termination by sending a crafted FTP control session negotiating AUTH GSSAPI followed by a large ADAT control line. Attackers can exploit the NVT_Analyzer component's lack of a maximum line length check, causing it to continuously double its internal buffer without bounds during base64 decoding of an attacker-controlled ADAT token, resulting in denial of service of the Zeek sensor.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Zeek

Products

Zeek

CVE-2026-58465

Eclipse Wakaama CoAP Block1 Handler Unbounded Memory Allocation DoS

Eclipse Wakaama before snapshot/2026-05-26 contains an unbounded memory allocation vulnerability in the CoAP Block1 handler within coap/block.c that allows unauthenticated remote attackers to exhaust server memory by sending a sequence of Block1 PUT requests with incrementing block numbers. Attackers can target the registration endpoint over UDP without authentication, causing the server to repeatedly reallocate a growing accumulation buffer by appending each block payload without enforcing any maximum total size limit, resulting in denial of service through memory exhaustion.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Eclipse

Products

Wakaama

CVE-2026-55205

Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint

Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint that allows unbounded accumulation of in-memory flow state and daemon threads. Attackers can send repeated or concurrent requests to exhaust server memory and thread resources, potentially triggering repeated outbound device-code requests to upstream OAuth providers.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-49955

Hermes WebUI < 0.51.270 Resource Exhaustion via passkey/options

Hermes WebUI before version 0.51.270 contains a resource exhaustion vulnerability that allows unauthenticated remote attackers to degrade service availability by repeatedly calling the passkey options endpoint without completing assertion. Attackers can send unlimited POST requests to the authentication endpoint, causing unbounded growth of the challenge store file and excessive CPU and disk I/O through repeated JSON file rewrites.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Get-hermes Nesquena

Products

Hermes Web Ui Hermes-webui

CVE-2026-50506

OData for ASP.NET and ASP.NET Core Denial of Service Vulnerability

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

CVSS 3.1 · 7.5 High EPSS 1.2% KEV · Not listed

Vendors

Microsoft

Products

.asp.net .asp.netcore Asp.net Core Odata and 1 more

CVE-2026-39904

Gophish 0.12.1 Denial of Service via Office Document Upload

Gophish through 0.12.1 contains a denial of service vulnerability that allows authenticated users with the User role to exhaust server memory by uploading a crafted Office document as an email template attachment. The ApplyTemplate() function in models/attachment.go processes Office documents as ZIP archives and calls ioutil.ReadAll() on each contained file entry without enforcing size restrictions on uncompressed content, allowing a zip bomb payload to expand to several gigabytes in memory and cause the process to be terminated by the operating system.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Getgophish

Products

Gophish

CVE-2026-59200

Pillow: Decompression Bomb DoS via PdfParser.PdfStream.decode()

Pillow is a Python imaging library. From 5.1.0 until 12.3.0, PdfParser.PdfStream.decode() in PIL/PdfParser.py calls zlib.decompress() with bufsize set to the PDF stream Length field without bounding the decompressed output size, allowing a crafted FlateDecode PDF stream to exhaust memory from a small file. This issue is fixed in version 12.3.0.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Python Python-pillow

Products

Pillow Pillow

CVE-2026-45646

OData for ASP.NET and ASP.NET Core Denial of Service Vulnerability

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

CVSS 3.1 · 7.5 High EPSS 1.2% KEV · Not listed

Vendors

Microsoft

Products

.asp.net .asp.netcore Asp.net Core Odata and 1 more

CVE-2026-12707

Unbounded path event queue growth in quiche via peer-driven source connection ID rotation

Summary Cloudflare quiche was discovered to be vulnerable to memory resource exhaustion due to unbounded queuing of post-handshake client migration events. Impact quiche supports the connection migration features described in Section 9 of RFC 9000, which allows a single QUIC connection to survive changes in the network path. Although quiche implements the protections described in Section 9.3 of RFC 9000 to limit server state commitment, it was discovered that the collection of PathEvents, intended to be consumed by applications via the path_event_next() function, was not bounded. Once the QUIC handshake completed, a peer could exploit rapid source address migration in order to cause unbounded queuing of the PathEvent::ReusedSourceConnectionId type. Servers are vulnerable even if active connection migration is disabled. Mitigation: * Applications can call path_event_next() to drain the PathEvent collection, mitigating the attack. * Users are requested to upgrade to quiche 0.29.3 which is the earliest version that prevents excessive queueing of PathEvent::ReusedSourceConnectionId.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Cloudflare

Products

Quiche