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CVE-2026-117555

GreycLab CImg through 4.0.6 Heap Out-of-Bounds Read via Integer Overflow in _load_bmp()

6.9 Medium

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

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
Low
Integrity
None
Availability
High

Exploit likelihood

0.13%Unchanged since Oct 28, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

GreycLab CImg through 4.0.6 Heap Out-of-Bounds Read via Integer Overflow in _load_bmp()

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Record
CVE-2026-117555
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-190
Updated
2026-11-02
EUVDEUVD-2026-110833 6.9

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Record
EUVD-2026-110833
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-88mq-c93j-j2w3 6.9

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function...

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Record
GHSA-88mq-c93j-j2w3
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/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
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-190
Updated
2026-11-02
NVD 6.9

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Record
CVE-2026-117555
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/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
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-190
Updated
2026-11-03
OSV 6.9

GreycLab CImg through 4.0.6 Heap Out-of-Bounds Read via Integer Overflow in _load_bmp()

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Record
CVE-2026-117555
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-190
Updated
2026-11-04
OSVDEBIAN-CVE-2026-117555 6.9

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Record
DEBIAN-CVE-2026-117555
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/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
2026-11-03
OSVUBUNTU-CVE-2026-117555 6.9

CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.

Record
UBUNTU-CVE-2026-117555
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
cimg
Debian:12
 All versions, plus listed versions
3.2.1+dfsg-13.2.1+dfsg-23.5.0+dfsg-13.5.2+dfsg-13.5.2+dfsg-24.0.4+dfsg-1
 None known
cimg
Debian:13
 All versions, plus listed versions
3.5.2+dfsg-13.5.2+dfsg-1+deb13u13.5.2+dfsg-24.0.4+dfsg-1
 None known
cimg
Debian:14
 All versions, plus listed versions
3.5.2+dfsg-13.5.2+dfsg-24.0.4+dfsg-1
 None known
cimg
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.6.4+dfsg-1build11.6.5+dfsg-1
 None known
cimg
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.7.9+dfsg-21.7.9+dfsg-2build11.7.9+dfsg-2ubuntu0.18.04.11.7.9+dfsg-2ubuntu0.18.04.21.7.9+dfsg-2ubuntu0.18.04.2+esm1
 None known
cimg
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.4.5+dfsg-1
 None known
cimg
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
2.9.4+dfsg-22.9.4+dfsg-32.9.4+dfsg-3ubuntu0.1~esm1
 None known
cimg
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
3.2.1+dfsg-13.2.1+dfsg-1ubuntu0.24.04.1~esm1
 None known
cimg
Ubuntu:26.10
 All versions, plus listed versions
3.5.2+dfsg-1build13.5.2+dfsg-2
 None known
cimg
Ubuntu:26.04:LTS
 All versions, plus listed versions
3.5.2+dfsg-13.5.2+dfsg-1build1
 None known

History

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

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

In short

CVE-2026-117555 is a medium vulnerability (CVSS 6.9) in Greyclab Cimg, published October 27, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.13%, the 2nd percentile. No source names a fixed version.

References

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