Staging Environment: Content and features may be unstable or change without notice.
Advisory details: pypa / pyload-ng/PYSEC-2026-121
Advisory ID pypa/pyload-ng/PYSEC-2026-121
Aliases CVE-2026-29778
GHSA-6px9-j4qr-xfjw
PYSEC-2026-121
Summary pyLoad is a free and open-source download manager written in Python. From version 0.5.0b3.dev13 to 0.5.0b3.dev96, the edit_package() function implements insufficient sanitization for the pack_folder parameter. The current protection relies on a single-pass string replacement of "../", which can be bypassed using crafted recursive traversal sequences. This issue has been patched in version 0.5.0b3.dev97.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3.1 6.5 https://github.com/pypa/advisory-database/blob/main/vulns/pyload-ng/PYSEC-2026-121.yaml
Reference id Reference type URL
GHSA-6px9-j4qr-xfjw Other https://github.com/pyload/pyload/security/advisories/GHSA-6px9-j4qr-xfjw
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/pypa/advisory-database/blob/main/vulns/pyload-ng/PYSEC-2026-121.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-09T17:52:31Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/29xxx/CVE-2026-29778.json

Source Advisory: vulnrichment/CVE-2026-29778

View SSVC decision tree 
[{'Exploitation': 'poc'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]