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» GHSA-2p9h-ccw7-33gf
Description
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the cleo PyPI package, when an attacker is able to supply arbitrary input to the Table.set_rows method.
Basic information
Type
reviewed
Severity
medium Advisory on GitHub
Open advisory ↗ Repository advisory
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Source code
Browse source ↗ Published (advisory)
2022-11-10 12:01:17 UTC
Updated
2026-07-02 20:40:19 UTC
GitHub reviewed
2022-11-10 18:52:40 UTC
NVD published
2022-11-09
EPSS Score
Score
Percentile
0.91%
55.52%
CVSS Scores
Base score
Version
Severity
Vector
5.9
3.1
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CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
CWEs
CWE id
Name
CWE-1333
Inefficient Regular Expression Complexity
Credits
neersighted
(analyst)
tdunlap607
(analyst)
levpachmanov
(analyst)
Affected packages (1)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
pip
cleo >= 1.0.0a1, < 2.0.0
2.0.0
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cvelogic
Threat Intelligence