Every CVE Search/ Get API key

CVE-2026-112300

DiffSK configobj __init__.py _sectionmarker redos

6.9 MediumFix available

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

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
None
Integrity
None
Availability
Low

Exploit likelihood

0.53%Up 0.1 points since Oct 20, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

DiffSK configobj __init__.py _sectionmarker redos

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
CVE-2026-112300
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:C
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:C
CVSS 2.0
5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:ND/RC:C
Weakness
CWE-1333, CWE-400
Updated
2026-11-02
EUVDEUVD-2026-104597 6.9

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
EUVD-2026-104597
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
Updated
2026-11-02
GitHub AdvisoriesGHSA-w53r-mv8r-wgxx 6.9

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is...

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
GHSA-w53r-mv8r-wgxx
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-400
Updated
2026-11-02
NVD 6.9

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
CVE-2026-112300
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-400, CWE-1333
Updated
2026-11-02
OSVBELL-CVE-2026-112300 5.3
Record
BELL-CVE-2026-112300
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSV 6.9

DiffSK configobj __init__.py _sectionmarker redos

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
CVE-2026-112300
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
Weakness
CWE-1333, CWE-400
Updated
2026-11-07
Show 4 moreShow less
OSVDEBIAN-CVE-2026-112300 6.9

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
DEBIAN-CVE-2026-112300
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-112300 6.9

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
UBUNTU-CVE-2026-112300
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSVAZL-110064 No score

CVE-2026-112300 affecting package python-configobj 5.0.6-7

A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/init.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Record
AZL-110064
Updated
2026-11-05
OSVopenSUSE-SU-2026:12473-1 No score

python313-configobj-5.0.9-2.1 on GA media

These are all security issues fixed in the python313-configobj-5.0.9-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:12473-1
Updated
2026-11-07

Affected products

Affected packages

Affected packages
PackageAffectedFixed
python-configobj
Azure Linux:3
 through 5.0.6-7 None known
py3-configobj
Alpaquita:23
 5.0.6-r10 and later None known
py3-configobj
Alpaquita:25
 5.0.9-r0 and later None known
py3-configobj
Alpaquita:stream
 5.0.6-r10 and later None known
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
 All versions, plus listed versions
5.0.9-1
 None known
configobj
Debian:14
 All versions, plus listed versions
5.0.9-1
 None known
configobj
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
4.7.2+ds-54.7.2+ds-5build14.7.2+ds-5ubuntu0.1~esm1
 None known
configobj
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
5.0.6-25.0.6-2ubuntu0.16.04.1~esm1
 None known
configobj
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
5.0.6-25.0.6-2ubuntu0.18.04.1~esm1
 None known
Show 6 moreShow less
Affected packages
PackageAffectedFixed
configobj
Ubuntu:20.04:LTS
 All versions, plus listed versions
5.0.6-35.0.6-3build15.0.6-45.0.6-4ubuntu0.1
 None known
configobj
Ubuntu:22.04:LTS
 All versions, plus listed versions
5.0.6-45.0.6-55.0.6-5ubuntu0.1
 None known
configobj
Ubuntu:24.04:LTS
 All versions, plus listed versions
5.0.8-25.0.8-3
 None known
configobj
Ubuntu:26.10
 All versions, plus listed versions
5.0.9-1build1
 None known
configobj
Ubuntu:26.04:LTS
 All versions, plus listed versions
5.0.9-15.0.9-1build1
 None known
python-configobj
openSUSE:Tumbleweed
 before 5.0.9-2.1
5.0.9-2.1

History

History
RecordedChangedSources
affected, aliases, facts, referencesOSV
factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-112300 is a medium vulnerability (CVSS 6.9) in Diffsk Configobj, published October 19, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 45th percentile. Fixed in python-configobj 5.0.9-2.1.

References

Show 8 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open