CVE-2026-56367

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 34.5% of scored records. A rank, not a probability.

NVD base score

6.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-26.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-21 13:26Z2 MO AGO

Last updated

2026-06-22 12:18Z2 MO AGO

Reserved

2026-06-21

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-125Out-of-bounds ReadBase
• CWE-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

03b78f78ca8dd4df8bbd53fdb5a9523089667facd2b2b1009d051d4423d129c8

• github.comGHSA Advisory GHSA-273h-m46v-96q4https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-273h-m46v-96q4vendor-advisory
• www.vulncheck.comVulnCheck Advisory: ImageMagick - Heap Out-of-Bounds Read in PSB RLE Decodinghttps://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-psb-rle-decodingthird-party-advisory