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CVE-2026-116724

FLTK through 1.4.5 Heap Buffer Overflow via Fl_BMP_Image Integer Overflow

8.5 High

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

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

0.15%Unchanged since Oct 27, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.5

FLTK through 1.4.5 Heap Buffer Overflow via Fl_BMP_Image Integer Overflow

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
CVE-2026-116724
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-190
Updated
2026-11-02
EUVDEUVD-2026-110505 8.5

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
EUVD-2026-110505
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
2026-11-02
GitHub AdvisoriesGHSA-vc45-5x28-58gf 8.5

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that...

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
GHSA-vc45-5x28-58gf
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-190
Updated
2026-11-02
NVD 8.5

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
CVE-2026-116724
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-190
Updated
2026-11-02
OSV 8.5

FLTK through 1.4.5 Heap Buffer Overflow via Fl_BMP_Image Integer Overflow

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
CVE-2026-116724
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-190
Updated
2026-11-02
OSVDEBIAN-CVE-2026-116724 8.5

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
DEBIAN-CVE-2026-116724
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
2026-11-02
OSVUBUNTU-CVE-2026-116724 8.5

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
UBUNTU-CVE-2026-116724
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-111109 No score

CVE-2026-116724 affecting package fltk 1.3.8-1

FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.

Record
AZL-111109
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
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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, factsOSV
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-2026-116724 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 0.15%, the 3rd percentile. No source names a fixed version.

References

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