CVE-2025-43857

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

0.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 41.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

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

2025-04-28 16:02Z1 YR AGO

Last updated

2025-04-28 18:00Z1 YR AGO

Reserved

2025-04-17

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.0)

CNA CVSS vector

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

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-405Asymmetric Resource Consumption (Amplification)Class
• CWE-770Allocation of Resources Without Limits or ThrottlingBase
• CWE-789Memory Allocation with Excessive Size ValueVariant

Data version

5.1

Document digest

fed5ea4b307c7b632d5a21ec49d0ebfb9495de5cb819f5c43c0e393447c5e757

• github.comhttps://github.com/ruby/net-imap/security/advisories/GHSA-j3g3-5qv5-52mjx_refsource_CONFIRM
• github.comhttps://github.com/ruby/net-imap/pull/442x_refsource_MISC
• github.comhttps://github.com/ruby/net-imap/pull/444/commits/0ae8576c1a90bcd9573f81bdad4b4b824642d105#diff-53721cb4d9c3fb86b95cc8476ca2df90968ad8c481645220c607034399151462x_refsource_MISC
• github.comhttps://github.com/ruby/net-imap/pull/445x_refsource_MISC
• github.comhttps://github.com/ruby/net-imap/pull/446x_refsource_MISC
• github.comhttps://github.com/ruby/net-imap/pull/447x_refsource_MISC