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Vulnerability Details :

CVE-2026-35464

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-07 Apr, 2026 | 14:38
Updated At-07 Apr, 2026 | 15:58
Rejected At-
Credits

pyLoad has an incomplete fix for CVE-2026-33509: unprotected storage_folder enables arbitrary file write to Flask session store and code execution

pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:07 Apr, 2026 | 14:38
Updated At:07 Apr, 2026 | 15:58
Rejected At:
▼CVE Numbering Authority (CNA)
pyLoad has an incomplete fix for CVE-2026-33509: unprotected storage_folder enables arbitrary file write to Flask session store and code execution

pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1.

Affected Products
Vendor
pyload
Product
pyload
Versions
Affected
  • <= 0.5.0b3.dev96
Problem Types
TypeCWE IDDescription
CWECWE-502CWE-502: Deserialization of Untrusted Data
CWECWE-863CWE-863: Incorrect Authorization
Type: CWE
CWE ID: CWE-502
Description: CWE-502: Deserialization of Untrusted Data
Type: CWE
CWE ID: CWE-863
Description: CWE-863: Incorrect Authorization
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j
x_refsource_CONFIRM
https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxx
x_refsource_MISC
https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1
x_refsource_MISC
https://www.cve.org/CVERecord?id=CVE-2026-33509
x_refsource_MISC
Hyperlink: https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxx
Resource:
x_refsource_MISC
Hyperlink: https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1
Resource:
x_refsource_MISC
Hyperlink: https://www.cve.org/CVERecord?id=CVE-2026-33509
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j
exploit
Hyperlink: https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j
Resource:
exploit
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:07 Apr, 2026 | 15:17
Updated At:23 Apr, 2026 | 15:13

pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CPE Matches

pyload
pyload
>>pyload>>Versions before 2026-04-02(exclusive)
cpe:2.3:a:pyload:pyload:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-502Secondarysecurity-advisories@github.com
CWE-863Secondarysecurity-advisories@github.com
CWE ID: CWE-502
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-863
Type: Secondary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1security-advisories@github.com
Patch
https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2jsecurity-advisories@github.com
Exploit
Vendor Advisory
Mitigation
https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxxsecurity-advisories@github.com
Exploit
Vendor Advisory
https://www.cve.org/CVERecord?id=CVE-2026-33509security-advisories@github.com
Third Party Advisory
https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Mitigation
Hyperlink: https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Mitigation
Hyperlink: https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxx
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://www.cve.org/CVERecord?id=CVE-2026-33509
Source: security-advisories@github.com
Resource:
Third Party Advisory
Hyperlink: https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory
Mitigation

Change History

0
Information is not available yet

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