CVE WatchSep 21, 2026

CVE-2026-61541

Zapros, a Python HTTP client, prior to version 0.14.0 is vulnerable to denial of service when an application requests content from an untrus

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 21, 2026 · Last modified: Sep 21, 2026 · CWE-770

EPSS · 30d

Not enough EPSS history yet.

Technical description

Zapros, a Python HTTP client, prior to version 0.14.0 is vulnerable to denial of service when an application requests content from an untrusted server, or follows a redirect to one, because a malicious response containing an excessive number of chained `Content-Encoding` values causes Zapros to construct a deeply nested decompression chain that consumes excessive resources. Version 0.14.0 patches the vulnerability by limiting responses to five content-encoding layers and raising `DecodingError` when that limit is exceeded. As a workaround, applications can add response middleware that inspects the `Content-Encoding` header and rejects responses containing more than a safe number of encoding layers.

Official references

github.comhttps://github.com/kap-sh/zapros/security/advisories/GHSA-5vjj-2r48-q622

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