CVE-2026-35464Public exploitNetwork attack vector

Authenticated code execution via Flask session poisoning

Published Apr 7, 2026 · Updated Apr 7, 2026

Incorrect authorization in pyLoad 0.5.0b3 and earlier allows remote authenticated users to execute code via session poisoning. The set_config_value API omits storage_folder from its admin-only options and permits downloads into Flask's filesystem session directory, where cachelib unpickles a predictable attacker-planted file. A non-admin account with SETTINGS and ADD permissions can plant the payload; a later request with the matching session cookie runs it as the service user.

CVSS severity7.5
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in pyLoad 0.5.0b3 and earlier allows remote authenticated users to execute code via session poisoning. The set_config_value API omits storage_folder from its admin-only options and permits downloads into Flask's filesystem session directory, where cachelib unpickles a predictable attacker-planted file. A non-admin account with SETTINGS and ADD permissions can plant the payload; a later request with the matching session cookie runs it as the service user.

The record

CVE
CVE-2026-35464
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
pyLoad
Product
pyLoad
Classifications
CWE-502, CWE-863, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 0.5.0b3.dev96

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

pyLoad · pyLoadversion=<= 0.5.0b3.dev96

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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