CVE-2026-61541

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Source

https://cve.org/CVERecord?id=CVE-2026-61541

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61541.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-61541

Aliases

Published

2026-09-21T21:21:21Z

Modified

2026-10-28T02:30:27Z

Severity

6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

Zapros has an Unbounded Content-Encoding decompression chain that allows denial of service

Details

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61541.json"
}

References

Affected packages

Git / github.com/kap-sh/zapros

Affected ranges

Type

GIT

Repo

https://github.com/kap-sh/zapros

Events

Introduced

Fixed

ac1510f14665db5dcd806931f5511c8e5ac3ef63

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.14.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.14.0"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

v0.*

v0.1.1

v0.10.0

v0.11.0

v0.11.1

v0.12.0

v0.13.0

v0.2.0

v0.2.1

v0.2.2

v0.2.3

v0.3.0

v0.4.0

v0.5.0

v0.5.1

v0.6.0

v0.7.0

v0.8.0

v0.9.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61541.json"