CVE-2020-37038

Code Blocks 20.03 - Denial Of Service

4.6 Medium

Code Blocks 20.03 contains a denial of service vulnerability that allows attackers to crash the application by manipulating input in the FSymbols search field. Attackers can paste a large payload of 5000 repeated characters into the search field to trigger an application crash.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Active

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.41%Up 0.4 points since Jan 31, 2026

What each source reports

CVE List Score used 4.6

Code Blocks 20.03 - Denial Of Service

Record: CVE-2020-37038
CVSS 4.0: 4.6 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

EUVDEUVD-2020-30940 4.6

Record: EUVD-2020-30940
CVSS 4.0: 4.6 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-jgmq-7wwp-jmfp 4.6

Code Blocks 20.03 contains a denial of service vulnerability that allows attackers to crash the...

Record: GHSA-jgmq-7wwp-jmfp
CVSS 4.0: 4.6 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/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: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

NVD 4.6

Record: CVE-2020-37038
CVSS 4.0: 4.6 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/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: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-37038 7.5

Record: DEBIAN-CVE-2020-37038
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-37038 4.6

Record: UBUNTU-CVE-2020-37038
CVSS 4.0: 4.6 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

code::blocks

Affected packages

Affected packages
Package	Affected	Fixed
`codeblocks` Ubuntu:16.04:LTS	All versions, plus listed versions 13.12-3.1build113.12+dfsg-4	None known
`codeblocks` Ubuntu:18.04:LTS	All versions, plus listed versions 16.01+dfsg-2.1	None known
`codeblocks` Ubuntu:20.04:LTS	All versions, plus listed versions 16.01+dfsg-2.117.12+dfsg-117.12+dfsg-1build120.03-3	None known
`codeblocks` Ubuntu:22.04:LTS	All versions, plus listed versions 20.03-320.03-3.1	None known
`codeblocks` Ubuntu:24.04:LTS	All versions, plus listed versions 20.03+svn13046-0.1build120.03+svn13046-0.220.03+svn13046-0.3build120.03+svn13046-0.3build2	None known
`codeblocks` Ubuntu:25.10	All versions, plus listed versions 20.03+svn13046-0.425.03+dfsg-2	None known
`codeblocks` Ubuntu:26.10	All versions, plus listed versions 25.03+dfsg-2.125.03+dfsg-3	None known
`codeblocks` Ubuntu:26.04:LTS	All versions, plus listed versions 25.03+dfsg-225.03+dfsg-2.1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2020-37038 is a medium vulnerability (CVSS 4.6) in Code::blocks, published January 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.