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CVE-2023-26112

configobj ReDoS exploitable by developer using values in a server-side configuration file

3.7 LowFix available

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

1.27%Up 1.2 points since Apr 3, 2023
90%50%10%1%

What each source reports

CVE List Score used 3.7

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
CVE-2023-26112
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P
Weakness
CWE-1333
Updated
2026-11-02
EUVDEUVD-2023-1260 3.7

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
EUVD-2023-1260
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P
Updated
2026-11-02
GitHub AdvisoriesGHSA-c33w-24p9-8m24 3.7

configobj ReDoS exploitable by developer using values in a server-side configuration file

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
GHSA-c33w-24p9-8m24
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-1333
Updated
2026-11-02
NVD 3.7

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
CVE-2023-26112
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1333
Updated
2026-11-02
OSV 5.9

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
CVE-2023-26112
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2023-26112 5.9

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
DEBIAN-CVE-2023-26112
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 9 moreShow less
OSVGHSA-c33w-24p9-8m24 3.7

configobj ReDoS exploitable by developer using values in a server-side configuration file

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
GHSA-c33w-24p9-8m24
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-1333
Updated
2026-11-02
OSVPYSEC-2026-1270 3.7

configobj ReDoS exploitable by developer using values in a server-side configuration file

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
PYSEC-2026-1270
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2023-26112 5.9

All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)). Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.

Record
UBUNTU-CVE-2023-26112
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSVopenSUSE-SU-2024:13199-1 No score

python310-configobj-5.0.8-3.1 on GA media

These are all security issues fixed in the python310-configobj-5.0.8-3.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:13199-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:12005-1 No score

python313-configobj-5.0.9-1.6 on GA media

These are all security issues fixed in the python313-configobj-5.0.9-1.6 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:12005-1
Updated
2026-11-02
OSVSUSE-SU-2023:3368-1 No score

Security update for python-configobj

This update for python-configobj fixes the following issues:

  • CVE-2023-26112: Fixed regular expression denial of service vulnerability in validate.py (bsc#1210070).
Record
SUSE-SU-2023:3368-1
Updated
2026-11-02
OSVSUSE-SU-2023:3369-1 No score

Security update for python-configobj

This update for python-configobj fixes the following issues:

  • CVE-2023-26112: Fixed regular expression denial of service vulnerability in validate.py (bsc#1210070).
Record
SUSE-SU-2023:3369-1
Updated
2026-11-02
OSVUSN-7040-1 No score

configobj vulnerability

It was discovered that ConfigObj contains regex that is susceptible to catastrophic backtracking. An attacker could possibly use this issue to cause a regular expression denial of service.

Record
USN-7040-1
Updated
2026-11-02
OSVUSN-7040-2 No score

configobj vulnerability

USN-7040-1 fixed a vulnerability in ConfigObj. This update provides the corresponding update for Ubuntu 14.04 LTS.

Original advisory details:

It was discovered that ConfigObj contains regex that is susceptible to catastrophic backtracking. An attacker could possibly use this issue to cause a regular expression denial of service.

Record
USN-7040-2
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
configobj
PyPI
 before 5.0.9
5.0.9
configobj
Debian:12
 All versions, plus listed versions
5.0.8-15.0.8-25.0.8-35.0.9-1
 None known
configobj
Debian:13
 before 5.0.8-2
5.0.8-2
configobj
Debian:14
 before 5.0.8-2
5.0.8-2
configobj
PyPI
 before 5.0.9, plus listed versions
4.4.04.5.04.5.14.5.24.5.3
Show 13 moreShow less
4.6.04.7.04.7.14.7.25.0.05.0.15.0.25.0.35.0.45.0.55.0.65.0.75.0.8
5.0.9
python-configobj
SUSE:Linux Enterprise Module for Public Cloud 12
 before 5.0.6-20.8.1
5.0.6-20.8.1
python-configobj
SUSE:Linux Enterprise Server 12 SP5
 before 5.0.6-20.8.1
5.0.6-20.8.1
python-configobj
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
 before 5.0.6-20.8.1
5.0.6-20.8.1
python-configobj
SUSE:Linux Enterprise Micro 5.4
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
python-configobj
SUSE:Linux Enterprise Module for Basesystem 15 SP4
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
Show 13 moreShow less
Affected packages
PackageAffectedFixed
python-configobj
SUSE:Linux Enterprise Module for Basesystem 15 SP5
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
python-configobj
SUSE:Linux Enterprise Real Time 15 SP3
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
python-configobj
SUSE:Manager Proxy 4.2
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
python-configobj
SUSE:Manager Server 4.2
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
python-configobj
openSUSE:Leap Micro 5.4
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
python-configobj
openSUSE:Leap 15.4
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
python-configobj
openSUSE:Leap 15.5
 before 5.0.6-150000.3.3.1
5.0.6-150000.3.3.1
configobj
Ubuntu:Pro:14.04:LTS
 before 4.7.2+ds-5ubuntu0.1~esm1, plus listed versions
4.7.2+ds-54.7.2+ds-5build1
4.7.2+ds-5ubuntu0.1~esm1
configobj
Ubuntu:Pro:16.04:LTS
 before 5.0.6-2ubuntu0.16.04.1~esm1, plus listed versions
5.0.6-2
5.0.6-2ubuntu0.16.04.1~esm1
configobj
Ubuntu:Pro:18.04:LTS
 before 5.0.6-2ubuntu0.18.04.1~esm1, plus listed versions
5.0.6-2
5.0.6-2ubuntu0.18.04.1~esm1
configobj
Ubuntu:20.04:LTS
 before 5.0.6-4ubuntu0.1, plus listed versions
5.0.6-35.0.6-3build15.0.6-4
5.0.6-4ubuntu0.1
configobj
Ubuntu:22.04:LTS
 before 5.0.6-5ubuntu0.1, plus listed versions
5.0.6-45.0.6-5
5.0.6-5ubuntu0.1
python-configobj
openSUSE:Tumbleweed
 before 5.0.9-1.6
5.0.9-1.6

History

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

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

In short

CVE-2023-26112 is a low vulnerability (CVSS 3.7) in Configobj Project Configobj, published April 3, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.27%, the 69th percentile. Fixed in configobj 5.0.9.

References

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