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CVE-2026-50142

libheif: unbounded heap allocation in HEIF sequence parser (stsz fixed-size mode missing bound check)

libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Struktur
Products
Libheif
CVE-2026-74836

HTTP/2 connection-window starvation pins Plug processes indefinitely in Bandit

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows an unauthenticated remote attacker to pin an unbounded number of HTTP/2 stream processes indefinitely via connection-level flow control. When a stream's response body outruns the HTTP/2 connection-level send window (default 65,535 bytes, shared across all streams on the connection), Bandit.HTTP2.Connection queues the remaining bytes and a reply closure in pending_sends and the stream process blocks forever inside a synchronous call to the connection process. Nothing bounds that wait and nothing purges the queue: a client RST_STREAM for the blocked stream is delivered to its mailbox but never read while it is stuck inside the call, so cancelling frees nothing, and periodic PING frames keep the transport-level read timeout from ever firing. The equivalent block on the stream-level send window is already bounded at 15 seconds; the connection-level path had no such bound. Each stalled stream pins its process, Plug state, and any resource the Plug holds across the blocked write, such as a pooled upstream connection in a reverse-proxy Plug. The attacker chooses any endpoint whose response exceeds the connection window (common for most non-trivial payloads), grants a generous stream-level window so only the connection window limits it, and keeps the connection alive with periodic PINGs; the primitive is repeatable across streams and connections at the cost of one idle socket each. This issue affects bandit: from 0.3.4 before 1.12.5.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Mtrudel
Products
Bandit
CVE-2026-61712

BuildKit: Possible runtime DoS via unbounded group parsing

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, BuildKit read attacker-controlled /etc/passwd and /etc/group files without an upper bound while resolving a username to a user identifier or group identifier in executor/oci/user.go and solver/llbsolver/ops/user_linux.go. A malicious base image or build could provide oversized files that exhausted memory during user resolution and caused out-of-memory termination of the buildkitd process. This issue is fixed in version 0.31.1.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Moby
Products
Buildkit
CVE-2026-75956

Joomla Extension - cmsjunkie.com - DOS vector in pagination parameter handling in J-BusinessDirectory < 6.2.3

Joomla Extension - cmsjunkie.com - DOS vector in pagination parameter handling in J-BusinessDirectory < 6.2.3 - Pagination values were not strictly typed. Array/non-numeric values (for example limitstart[]) could trigger PHP type errors in arithmetic, and limit was not validated before use in list queries.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Cmsjunkie.com
Products
J-businessdirectory Extension For Joomla
CVE-2026-42570

Svelte devalue: DoS via sparse array deserialization

Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Svelte
Products
Devalue
CVE-2026-75140

jsoup Uncontrolled Resource Consumption in XmlTreeBuilder

jsoup through 1.23.2, fixed in commit 862ba2f, contains an uncontrolled resource consumption vulnerability in XmlTreeBuilder that allows remote attackers to exhaust JVM heap memory by supplying a deeply nested XML document with uniquely-namespaced elements. The builder copies the entire inherited namespace map on every start element, causing quadratic time and memory complexity, which attackers can exploit to trigger an OutOfMemoryError and terminate the application.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Jhy
Products
Jsoup
CVE-2026-63495

Libevent: Unbounded memory accumulation in WebSocket server via fragmented frames

Libevent is an event notification library. From 2.2.0-alpha-dev until 2.2.2-alpha, the libevent WebSocket server in ws.c accumulates fragmented frames in evws->incomplete_frames without enforcing a total message-size limit. An unauthenticated remote client can repeatedly send fragmented WebSocket frames below WS_MAX_RECV_FRAME_SZ with FIN=0, causing the evbuffer to grow without bound until the process or host exhausts memory. This issue is fixed in version 2.2.2-alpha.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Libevent Project Redhat
Products
Libevent Hummingbird
CVE-2026-20177

Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability

A vulnerability in the handling of management plane packets by Cisco Industrial Ethernet (IE) 1000 Series Switches could allow an unauthenticated, remote attacker to&nbsp;cause the device manager, SSH, or API to become inaccessible.This vulnerability is due to insufficient protection against management plane flooding attacks. An attacker could exploit this vulnerability by sending a high rate of ICMP, SSH, or HTTP traffic to an affected device. A successful exploit could allow the attacker to cause the CPU of the device to increase, resulting in a denial of service (DoS) condition on the device manager web GUI, SSH, or API. Data traffic through the device is not affected.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Cisco
Products
Cisco Industrial Ethernet Switches
CVE-2026-20482

WLAN STA Firmware Logging Causes Remote Denial of Service on MediaTek Chipsets

In wlan STA FW, there is a possible system becoming unresponsive due to logging. This could lead to remote (proximal/adjacent) denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00486814; Issue ID: MSV-6824.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Mediatek Mediatek, Inc.
Products
Mt7902 Mt7902 Firmware Mt7921 and 8 more
CVE-2026-17076

IBM i is Affected By Multiple Vulnerabilities in DRDA / DDM

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to improper processing of DRDA and DDM resynchronization requests.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Ibm
Products
I
CVE-2026-7427

Allocation of Resources Without Limits or Throttling in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed an unauthenticated user to cause a denial of service due to improper input validation.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Gitlab
Products
Gitlab
CVE-2026-21710

Node.js: Node.js: Denial of Service due to crafted HTTP `__proto__` header

A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`. When this occurs, `dest["__proto__"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`. * This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**

CVSS 3.1 · 7.5 High EPSS 25.4% KEV · Not listed
Vendors
Nodejs Redhat
Products
Node.js Nodejs Enterprise Linux and 1 more
CVE-2026-41292

Long list of incoming EDNS options degrades performance

NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).

CVSS 4.0 · 6.6 Medium EPSS < 1% KEV · Not listed
Vendors
Nlnetlabs
Products
Unbound
CVE-2026-1526

undici is vulnerable to Unbounded Memory Consumption in undici WebSocket permessage-deflate Decompression

The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit on the decompressed data size. A malicious WebSocket server can send a small compressed frame (a "decompression bomb") that expands to an extremely large size in memory, causing the Node.js process to exhaust available memory and crash or become unresponsive. The vulnerability exists in the PerMessageDeflate.decompress() method, which accumulates all decompressed chunks in memory and concatenates them into a single Buffer without checking whether the total size exceeds a safe threshold.

CVSS 3.1 · 7.5 High EPSS 1.3% KEV · Not listed
Vendors
Nodejs Undici
Products
Undici Undici
CVE-2026-52732

ZEBRA: Mempool transaction admission denial via single-peer inbound queue saturation

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, one unauthenticated P2P peer can monopolize all 25 MAX_INBOUND_CONCURRENCY slots in Zebra's inbound mempool download and verification pipeline. In zebrad/src/components/mempool/downloads.rs, the bounded queue was shared globally without per-peer accounting, while peer identity was not carried through Gossip and FullQueue responses were mapped to Response::Nil instead of reaching overload disconnection handling. An attacker can advertise fake transaction identifiers and remain silent so each task holds a slot until TRANSACTION_DOWNLOAD_TIMEOUT, then periodically refill the queue as slots expire. While saturated, honest peer transactions and local sendrawtransaction requests are rejected with MempoolError::FullQueue, although block validation and synchronization continue. This issue is fixed in version 4.5.0.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Zcashfoundation
Products
Zebra
CVE-2026-73635

Apache Struts: Unbounded growth of localized-text caches driven by the request locale

Allocation of resources without limits or throttling vulnerability in Apache Struts. When no fixed locale is configured, the locale used for localized-text lookups is taken from the incoming request, allowing an unauthenticated remote client to cause the framework's internal localized-text caches to grow without bound and exhaust the Java heap, denying service to other users. Applications that configure a fixed locale are not affected. This issue affects Apache Struts: from 2.0.0 through 2.3.37, from 2.5.0 through 2.5.33, from 6.0.0 through 6.10.0, from 7.0.0 through 7.2.1. Users are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Struts
CVE-2026-47683

vm2: bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, the bufferAllocLimit enforcement in lib/setup-sandbox.js does not cover Buffer.concat(list, totalLength) or Buffer.from(arrayLike) with an attacker-controlled length, allowing sandbox code to perform large synchronous host external-memory allocations that bypass the configured cap and can exhaust the host process. This issue is fixed in version 3.11.6.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Patriksimek
Products
Vm2
CVE-2026-13074

Awaitable Hello Command in Exhaust Mode Unthrottled Response Loop Leading to Denial of Service

An unauthenticated remote client can cause excessive CPU consumption on a MongoDB server by sending a specific combination of parameters to the awaitable hello command in exhaust mode. The server's handling of this combination results in a response loop that bypasses normal throttling, allowing a small number of connections to degrade server availability.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-13075

$rankFusion and $scoreFusion Unbounded Memory Allocation During Error Suggestion Generation

An authenticated user can cause the mongod process to be terminated by the operating system under memory pressure via the $rankFusion and $scoreFusion aggregation stages. The issue originates in the server's error-handling path and requires the ability to run aggregation queries.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server