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CVE-2020-17446

Asyncpg Arbitrary Code Execution Via Access to an Uninitialized Pointer

9.8 CriticalFix available

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.42%Up 1.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
CVE-2020-17446
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-824
Updated
2026-11-02
CVE List No score

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
CVE-2020-17446
Updated
2026-11-02
EUVDEUVD-2020-0048 No score

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
EUVD-2020-0048
Updated
2026-11-03
GitHub AdvisoriesGHSA-2xpj-f5g2-8p7m 9.3

Asyncpg Arbitrary Code Execution Via Access to an Uninitialized Pointer

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
GHSA-2xpj-f5g2-8p7m
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-824
Updated
2026-11-02
OSV 9.8

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
CVE-2020-17446
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-17446 9.8

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
DEBIAN-CVE-2020-17446
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVGHSA-2xpj-f5g2-8p7m 9.3

Asyncpg Arbitrary Code Execution Via Access to an Uninitialized Pointer

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
GHSA-2xpj-f5g2-8p7m
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-824
Updated
2026-11-02
OSVUBUNTU-CVE-2020-17446 9.8

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
UBUNTU-CVE-2020-17446
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:11215-1 No score

python38-asyncpg-0.22.0-2.2 on GA media

These are all security issues fixed in the python38-asyncpg-0.22.0-2.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11215-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:14132-1 No score

python310-asyncpg-0.29.0-1.3 on GA media

These are all security issues fixed in the python310-asyncpg-0.29.0-1.3 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14132-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:11998-1 No score

python313-asyncpg-0.31.0-1.4 on GA media

These are all security issues fixed in the python313-asyncpg-0.31.0-1.4 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11998-1
Updated
2026-11-02
OSVPYSEC-2020-24 No score

asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, because of access to an uninitialized pointer in the array data decoder.

Record
PYSEC-2020-24
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
asyncpg
PyPI
 before 0.21.0
0.21.0
asyncpg
Debian:12
 before 0.21.0-1
0.21.0-1
asyncpg
Debian:13
 before 0.21.0-1
0.21.0-1
asyncpg
Debian:14
 before 0.21.0-1
0.21.0-1
asyncpg
Debian:9
 before 0.8.4-1+deb9u1, plus listed versions
0.8.4-1
0.8.4-1+deb9u1
asyncpg
PyPI
 before 0.21.0, plus listed versions
0.10.00.10.10.11.00.12.00.13.0
Show 27 moreShow less
0.14.00.15.00.16.00.17.00.18.00.18.10.18.20.18.30.19.00.20.00.20.10.5.00.5.10.5.20.5.30.5.40.6.10.6.20.6.30.7.00.8.00.8.10.8.20.8.30.8.40.9.00.9.0.dev1
0.21.0
asyncpg
PyPI
 before 0.21.0, plus listed versions
0.5.00.5.10.5.20.5.30.5.4
Show 27 moreShow less
0.6.10.6.20.6.30.7.00.8.00.8.10.8.20.8.30.8.40.9.0.dev10.9.00.10.00.10.10.11.00.12.00.13.00.14.00.15.00.16.00.17.00.18.00.18.10.18.20.18.30.19.00.20.00.20.1
0.21.0
asyncpg
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.12.0-1ubuntu30.13.0-1ubuntu3
 None known
asyncpg
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.13.0-1ubuntu50.20.0-10.20.0-1build1
 None known
python-asyncpg
openSUSE:Tumbleweed
 before 0.29.0-1.3
0.29.0-1.3
python-asyncpg
openSUSE:Tumbleweed
 before 0.31.0-1.4
0.31.0-1.4

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-17446 is a critical vulnerability (CVSS 9.8) in Magic Asyncpg, published August 12, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.42%, the 84th percentile. Fixed in asyncpg 0.21.0.

References

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