CVE-2026-54056Public exploitNetwork attack vector

File overwrite via symlink-following remote drop staging

Published Jun 12, 2026 · Updated Jun 12, 2026

Link following in kitten dnd in Kovid Goyal kitty 0.47.0 through 0.47.1 allows remote attackers to overwrite user-writable files via a remote drop. Duplicate remote basenames let a staged symlink precede a same-name regular file, which CreateAt opens with truncation but without O_NOFOLLOW. Exploitation requires a local user to perform remote drag and drop on a case-sensitive filesystem; writes remain limited to that user's permissions.

CVSS severity7.6
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Link following in kitten dnd in Kovid Goyal kitty 0.47.0 through 0.47.1 allows remote attackers to overwrite user-writable files via a remote drop. Duplicate remote basenames let a staged symlink precede a same-name regular file, which CreateAt opens with truncation but without O_NOFOLLOW. Exploitation requires a local user to perform remote drag and drop on a case-sensitive filesystem; writes remain limited to that user's permissions.

The record

CVE
CVE-2026-54056
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Kovid Goyal
Product
kitty
Classifications
CWE-59, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.47.0, < 0.47.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kovid Goyal · kittyversion=>= 0.47.0, < 0.47.2

Published CVSS scores

7.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L
7.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo