Every CVE Search/ Get API key

CVE-2026-116723

FLTK through 1.4.5 Stack Buffer Overflow via Fl_BMP_Image colors_used Field

8.5 High

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.16%Unchanged since Oct 27, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.5

FLTK through 1.4.5 Stack Buffer Overflow via Fl_BMP_Image colors_used Field

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
CVE-2026-116723
CVSS 4.0
8.5 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-121
Updated
2026-11-05
EUVDEUVD-2026-110504 8.5

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
EUVD-2026-110504
CVSS 4.0
8.5 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-05
GitHub AdvisoriesGHSA-64v9-4hfh-jmvh 8.5

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image:...

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
GHSA-64v9-4hfh-jmvh
CVSS 4.0
8.5 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/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
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-121
Updated
2026-11-02
NVD 8.5

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
CVE-2026-116723
CVSS 4.0
8.5 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/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
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-121
Updated
2026-11-05
OSV 8.5

FLTK through 1.4.5 Stack Buffer Overflow via Fl_BMP_Image colors_used Field

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
CVE-2026-116723
CVSS 4.0
8.5 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-121
Updated
2026-11-07
OSVDEBIAN-CVE-2026-116723 8.5

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
DEBIAN-CVE-2026-116723
CVSS 4.0
8.5 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/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
2026-11-06
OSVUBUNTU-CVE-2026-116723 8.5

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
UBUNTU-CVE-2026-116723
CVSS 4.0
8.5 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-05
OSVAZL-111106 No score

CVE-2026-116723 affecting package fltk 1.3.8-1

FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.

Record
AZL-111106
Updated
2026-11-05
OSVopenSUSE-SU-2026:12362-1 No score

fltk-devel-1.3.11-2.1 on GA media

These are all security issues fixed in the fltk-devel-1.3.11-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:12362-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
fltk
Azure Linux:3
 through 1.3.8-1 None known
fltk1.3
Debian:12
 All versions, plus listed versions
1.3.11-11.3.11-21.3.11-31.3.8-51.3.8-61.3.8-6.11.3.8-6.1~exp1
 None known
fltk1.3
Debian:13
 All versions, plus listed versions
1.3.11-21.3.11-3
 None known
fltk1.3
Debian:14
 All versions, plus listed versions
1.3.11-21.3.11-3
 None known
fltk1.4
Debian:13
 All versions, plus listed versions
1.4.3-11.4.4-11.4.4-21.4.4-31.4.4-4
 None known
fltk1.4
Debian:14
 All versions, plus listed versions
1.4.3-11.4.4-11.4.4-21.4.4-31.4.4-4
 None known
fltk1.3
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.3.3-41.3.3-61.3.3-7
 None known
fltk1.3
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.3.4-6
 None known
fltk1.3
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.3.4-9ubuntu11.3.4-101.3.4-10build1
 None known
fltk1.3
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.3.5-31.3.8-21.3.8-31.3.8-4
 None known
Show 6 moreShow less
Affected packages
PackageAffectedFixed
fltk1.3
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.3.8-51.3.8-61.3.8-6.1build11.3.8-6.1build2
 None known
fltk1.3
Ubuntu:26.10
 All versions, plus listed versions
1.3.11-3
 None known
fltk1.4
Ubuntu:26.10
 All versions, plus listed versions
1.4.4-31.4.4-4
 None known
fltk1.3
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.3.11-21.3.11-3
 None known
fltk1.4
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.4.3-1ubuntu21.4.4-11.4.4-21.4.4-3
 None known
fltk
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 1.3.11-2.1
1.3.11-2.1

History

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

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

In short

CVE-2026-116723 is a high vulnerability (CVSS 8.5) in Fltk, published October 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 5th percentile. No source names a fixed version.

References

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