CVE-2026-55798

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• 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

0.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 7.4% of scored records. A rank, not a probability.

NVD base score

4.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

NVD analysis status

Analyzed. NVD last modified this record on 2026-07-07.

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

2026-07-06 18:44Z2 MO AGO

Last updated

2026-07-07 15:19Z1 MO AGO

Reserved

2026-06-17

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 4.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

Weaknesses

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.2

Document digest

59c319cbd4650f7baed320a8668af5d978163cbde510fa11bc9067665cdefd17

• github.comhttps://github.com/python-pillow/Pillow/security/advisories/GHSA-4x4j-2g7c-83w6x_refsource_CONFIRM
• github.comhttps://github.com/python-pillow/Pillow/commit/8404ea5fe5df40fc34aa1e51403dd6fce0778b8ax_refsource_MISC
• github.comhttps://github.com/python-pillow/Pillow/commit/88194166691b7b603529b8b036ab3ab9cedd2de4x_refsource_MISC
• github.comhttps://github.com/python-pillow/Pillow/commit/b0e06caa64c1405aa3da0bb1d2bd9a77ca22de7fx_refsource_MISC
• github.comhttps://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rstx_refsource_MISC