CVE-2026-61541 | BDVDB-2026-377342 Detail

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.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-09-21Record published in the CVE List.
2. Version 22026-09-23Most recent update recorded in the CVE List.