Weakness (CWE)
CWE-835: Loop with Unreachable Exit Condition
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
Source: MITRE CWE-835
291 results · Clear filters · Feed
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High 7.5
Denial of Service vulnerability in SAP NetWeaver Application Server ABAP, ABAP Platform and SAP Web Dispatcher
SAP NetWeaver Application Server ABAP, ABAP Platform, and SAP Web Dispatcher do not sufficiently handle resource consumption when processing certain requests. An unauthenticated attacker could send specially crafted requests to the affected component, causing…
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High 7.5
Hickory DNS NSEC3 Closest-Encloser Proof Unbounded Loop Denial of Service
Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 and hickory-net before 0.26.1 contain an unbounded loop vulnerability in DnssecDnsHandle NSEC3 closest-encloser proof validation when the SOA owner is not an ancestor of the QNAME. Upstream attackers can…
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High 7.5
Hickory DNS 0.26.0-beta.1 before 0.26.2 Resource Exhaustion DoS via NameServerPool::try_send TC-Retry Loop
Hickory DNS hickory-resolver 0.26.0-beta.1 before 0.26.2 contains an unbounded retry loop in NameServerPool::try_send, which re-queues truncated (TC) responses without checking the answering transport or counting iterations. A malicious authoritative server r…
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High 7.5
Keycloak-services: keycloak-services: unauthenticated jvm termination via saml 1.1 authoritybinding parsing loop
A flaw was found in the SAML 1.1 assertion parser of Keycloak, a tool used for identity and access management. The issue occurs when the parser handles a specific element called AuthorityBinding within an authentication statement. Due to an incomplete fix for…
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High 7.5
Keycloak-services: keycloak-services: unauthenticated cpu exhaustion via saml 1.1 keyinfo infinite loop
A flaw was found in the SAML 1.1 XML parsing logic of Keycloak, an open-source identity and access management solution. The issue occurs when the parser encounters unexpected elements within a security token's key information section, causing the processing t…
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High 7.5
In the NAS Authentication Request message decoding procedure, a missing lower bound check causes an infinite loop, lead…
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High 7.7
Kyverno before 1.19.2 Denial of Service via Nested Variable Substitution Loop
Kyverno before 1.19.2 contains a denial of service vulnerability in substituteVariablesIfAny that allows low-privileged users to hang the admission webhook via self-referential variable templates. Attackers can create resources whose annotations re-introduce …
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High 7.5
Moleculer: Unauthenticated Denial of Service via negative length field in the TCP transporter packet parser
Moleculer is a progressive microservices framework for Node.js. Prior to 0.14.36 and 0.15.2, Parser._write in src/transporters/tcp/parser.js used Buffer.prototype.readInt32BE to read a signed packet length, so a remote unauthenticated peer could supply a nega…
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High 7.5
CGI versions before 5.00 for Perl allow an infinite loop on a short request body when $DISABLE_UPLOADS is set
CGI versions before 5.00 for Perl allow an infinite loop on a short request body when $DISABLE_UPLOADS is set. When $CGI::PUTDATA_UPLOAD or an upload hook is set, read_postdata_putdata takes a request body that is not a form submission. With $CGI::DISABLE_UPL…
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High 7.5
CVE-2026-120596
A remotely exploitable denial-of-service vulnerability exists in the TCP options parser of the Nut/Net TCP/IP stack included in Nut/OS, developed by Ethernut/Egnite. Nut/OS releases up to version 5.1 are affected. An unauthenticated attacker can send a single…
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High 7.5
Json-glib: json-glib: infinite loop in json_path_query() with negative jsonpath slice step
A flaw was found in json-glib. The JSONPath slice evaluator used by json_path_query() can enter an infinite loop when given a slice expression with a negative step. An application that evaluates attacker-controlled JSONPath expressions can be forced into a ha…
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High 7.1
pypdf: Possible infinite loop when cloning dictionaries
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source …
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High 7.1
pypdf: Possible infinite loop when hitting EOF in standard xref table during trailer search
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop while opening a crafted incomplete PDF whose standard cross-reference table reaches the end of the file without a trailer. The trailer search can repeat…
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High 8.7
Infinite loop when reading PDPortDataCheck record of subslot 0
P-Net before 1.0.3 enters an infinite loop when handling a read request for the PDPortDataCheck record with subslot 0 (whole module). The loop over the ports never advanced to the next port, so the request never completes and the device stops responding. A re…
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High 7.5
Session Smart Router: Integer overflow causes denial of service during TLS certificate inspection
An Integer Overflow vulnerability in the DPI certificate scanner in Juniper Networks Session Smart Router allows an unauthenticated remote attacker to cause a denial of service via a specially crafted TLS server certificate.
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High 7.5
Uncontrolled Resource Consumption in Telerik Document Processing Libraries RadSpreadProcessing and RadSpreadStreamProcessing
In Progress® Telerik® Document Processing Libraries prior to version 2026.3.1027, uncontrolled recursion, infinite loop, unchecked loop condition and inefficient regular expression vulnerabilities in RadSpreadProcessing and RadSpreadStreamProcessing allow an …
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High 7.5
Uncontrolled Resource Consumption in Telerik Document Processing Libraries RadPdfProcessing and AI Document Summarization and Question Answering
In Progress® Telerik® Document Processing Libraries prior to version 2026.3.1027, uncontrolled recursion, infinite loop, inefficient algorithmic complexity and resource allocation vulnerabilities in RadPdfProcessing and AI document summarization and question …
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High 7.5
Uncontrolled Resource Consumption in Telerik Document Processing Libraries RadWordsProcessing
In Progress® Telerik® Document Processing Libraries prior to version 2026.3.1027, uncontrolled recursion, inefficient algorithmic complexity and infinite loop vulnerabilities in RadWordsProcessing allow an unauthenticated attacker to terminate or hang the hos…
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High 7.5
Seroval: fromJSON deserializer trusts sequence doneAt (unauthenticated event-loop DoS)
Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON and fromCrossJSON do not validate a sequence node's done index. A crafted done index can create an iterator that ne…
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High 8.7
HTTP/2 WINDOW_UPDATE and SETTINGS frames reset the request body read timeout in Bandit
Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 request body reader of mtrudel bandit allows an unauthenticated remote attacker to hold stream processes open indefinitely via WINDOW_UPDATE or empty SETTINGS frames sent while a…
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High 7.5
HAProxy 3 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (persistent worker-thread …
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High 7.1
Pillow: TarIO negative size field causes infinite CPU-spin loop
Pillow is a Python imaging library. Prior to 13.0.0, the TarIO initializer in src/PIL/TarIO.py accepts a negative octal member size and computes a backward seek that returns to the same 512-byte header. When the requested member name does not match, the parse…
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High 8.7
JITServer: Pre-authentication remote Denial of Service via integer overflow infinite loop in MessageBuffer::computeRequiredCapacity()
In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component is vulnerable to a pre-authentication remote denial of service. When processing the initial 4-byte length field of an incoming TCP connection, an integer overflow in `MessageBuffer::computeRe…
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High 8.1
never-ending loop via server response omission
By permanently omitting the final control-response line, a malicious FTP, IMAP, POP3, or SMTP server can exploit libcurl and completely bypass its configured transfer timeout mechanism, indefinitely blocking all concurrent transfers bound to the same multi-ha…
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High 8.7
Pillow: Infinite loop in PdfParser.rewrite_pages on page tree Parent cycle
Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow can enter an infinite loop while rewriting PDF pages. PdfParser.rewrite_pages() follows Parent relationships without detecting a cycle in the page tree. An attacker can supply a cyclic PDF to…
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High 8.2
Pillow: Infinite loop in MIC n_frames when the embedded TIFF
Pillow is a Python imaging library. From 7.2.0 until 13.0.0, Pillow can enter an infinite loop while determining the frame count of a MIC image. MicImageFile inherits TIFF frame traversal, but MicImageFile.tell reports the OLE stream index and its seek() rese…
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High 8.7
libIEC61850: Infinite loop and out-of-bounds read in ACSE parseUserInformation when parsing a malformed AARE PDU
libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. Prior to 1.6.2, parseUserInformation in src/mms/iso_acse/acse.c checks len for zero before validating the negative bufPo…
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High 7.5
J4Care dcm4che Loop with Unreachable Exit Condition
MP4Parser does not adequately validate MP4 box sizes. A malformed box can cause parsing to make no forward progress and repeatedly process the same input.
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High 7.5
J4Care dcm4che Loop with Unreachable Exit Condition
JPEGParser can enter an infinite loop while parsing a specially crafted or truncated stream.
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High 7.5
Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction
Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VM_JMP instruction whose target is greater than or equal to the prepared program's codeSize. …
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High 7.5
Infinite loop on empty option name in startup options parameter in PgBouncer
An infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service. A StartupMessage whose options parameter contains an empty parameter name, such as "-c=", makes the ignore_startup_parameters list look…
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High 7.5
Junos OS and Junos OS Evolved: An attacker causes an rpd denial of service when EVPN multihoming preference-based DF election is used
A Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a remote network attacker to cause a denial of service via EVPN multihoming with preference-ba…
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High 7.5
Junos OS: MX Series: An attacker causes a Routing Engine denial of service when SCTP service is used
A Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in netsctp.ko of Juniper Networks Junos OS on MX Series allows an unauthenticated network attacker to cause a denial of service via crafted SCTP network traffic.
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High 8.7
Angular SSR: Denial of Service (DoS) via Infinite Loop on Malformed DOCTYPE
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.31, 21.2.23, and 22.1.6, the @angular/platform-server DOM emulation parser can enter an infinite synchronous loop…
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High 7.5
Gnome-remote-desktop: busy-wait dos in vnc tls i/o handlers (gnutls_e_again / gnutls_e_interrupted)
A flaw was found in gnome-remote-desktop as shipped in Red Hat Enterprise Linux. In the VNC TLS I/O handlers, retryable GnuTLS results (GNUTLS_E_AGAIN and GNUTLS_E_INTERRUPTED) are handled with an unbounded busy loop instead of yielding to the event loop. A r…
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High 7.5
Loop with Unreachable Exit Condition ('Infinite Loop') in hMailServer
Inefficient algorithmic complexity and a non-terminating loop in the MIME processing of received messages in Progressive Robot hMailServer 6.0.0 through 6.3.5 allow a remote unauthenticated attacker to make the mail services unavailable by sending a message. …
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High 7.3
Infinite Loop in Telerik Document Processing XLS Import
In Progress® Telerik® Document Processing SpreadProcessing library, versions prior to 2026.3.1006, an infinite loop vulnerability exists when importing an XLS file with a specifically-targted corruption, the import timeout is ignored resulting in an unrespons…
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High —
hickory-resolver: Unbounded TC-retry loop in `NameServerPool::try_send` (resource-exhaustion DoS)
When the `hickory-resolver` name server pool implementation receives an upstream response with the TC (truncated) header bit set, it re-queues the request to the same nameserver to retry with UDP transport disabled. However, the retry arm never inspects the t…
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High 8.2
Apache Thrift: c_glib `read_all` spins when the underlying read returns 0
Loop with unreachable exit condition ('infinite loop') vulnerability in Apache Thrift c_glib bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.
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High 8.2
Apache Thrift: Python `TNonblockingServer` busy-loops and stops selecting all fds after an 8192-byte-boundary frame
Loop with unreachable exit condition ('infinite loop') vulnerability in Apache Thrift python bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.