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
2026-09-23T03:30:34Z
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
0 Unknown introduced commit / All previous commits are affected
Fixed
ac1510f14665db5dcd806931f5511c8e5ac3ef63
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.14.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

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"