CVE-2025-59956

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

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 35.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2025-09-29 23:57Z11 MO AGO

Last updated

2025-09-30 14:14Z11 MO AGO

Reserved

2025-09-23

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-350Reliance on Reverse DNS Resolution for a Security-Critical ActionVariant
• CWE-290Authentication Bypass by SpoofingBase

Data version

5.1

Document digest

9039b6fd24615d95af7955e4f254b13378ea1540f90ba772efda5d175888129d

• github.comhttps://github.com/coder/agentapi/security/advisories/GHSA-w64r-2g3w-w8w4x_refsource_CONFIRM
• github.comhttps://github.com/coder/agentapi/pull/49x_refsource_MISC
• github.comhttps://github.com/coder/agentapi/commit/5c425c62447b8a9eac19e9fc5a2eae7f0803f149x_refsource_MISC
• github.bloghttps://github.blog/security/application-security/localhost-dangers-cors-and-dns-rebindingx_refsource_MISC
• github.comhttps://github.com/coder/agentapi/releases/tag/v0.4.0x_refsource_MISC
• mcpsec.devhttps://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltrationx_refsource_MISC
• mcpsec.devhttps://mcpsec.dev/advisories/2025-09-19-coder-chat-exfiltration/exploit