pyLoad: Unbounded Memory Growth Leading to DoS and Potential DDoS in EventManager (CVE-2026-48987) | HOL Guard CVE

Medium severityCVE-2026-48987GHSA-C2F9-4MC8-J656

pyLoad: Unbounded Memory Growth Leading to DoS and Potential DDoS in EventManager

Answer in brief

CVE-2026-48987 records a Medium severity vulnerability in pyLoad: Unbounded Memory Growth Leading to DoS and Potential DDoS in EventManager. The current sources do not mark it as known exploited. The current feed maps pyload/pyload (generic), pyload-ng (pip). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 15, 2026Source checked Sep 17, 2026First seen by HOL Jul 9, 2026Material review Sep 15, 2026

Upstream Advisory

Key facts

Risk: Medium
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps pyload/pyload (generic), pyload-ng (pip). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
pyload/pyloadgeneric	< 0.5.0b3.dev101	Not reported
pyload-ngpip	<=0.5.0b3.dev100	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for pyload/pyload, pyload-ng.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 9, 2026

Sources and claim methodology

Upstream source description

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev101, EventManager in src/pyload/core/managers/event_manager.py appends a Client object to the clients list for each unique uuid submitted to the authenticated getEvents API endpoint, but get_events does not invoke the available clean method to remove inactive clients. An authenticated user can repeatedly submit unique UUID values, causing retained client objects and process memory to grow without bound even after requests stop. The resulting memory exhaustion can trigger an operating-system out-of-memory termination of pyLoad or host-wide instability and denial of service. This issue is fixed in version 0.5.0b3.dev101.

Quoted source text, attributed separately from HOL analysis.