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CVE-2026-42850· NVD / CVE Program· CNA GitHub_M

Kitty has a shell command injection

Noroxi assessment

Priority: Monitor (action score 29/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. Special conditions such as timing or configuration are required.
  • Fixed version: kitty (Debian:13) 0.41.1-2+deb13u2; kitty (Debian:14) 0.47.0-1; kitty (openSUSE:Leap 16.0) 0.48.2-bp160.1.1.

Low priority for now. Upgrade to kitty (Debian:13) 0.41.1-2+deb13u2; kitty (Debian:14) 0.47.0-1; kitty (openSUSE:Leap 16.0) 0.48.2-bp160.1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.0, it is possible to inject commands within the subshell through kitty error. A special escape code will make kitty return an error, this error is not escaped and will be correctly echoed back to the terminal with CRLF, as such it will be run by the shell in use. To exploit this bug, the victim must use a netcat or a similar program to connect to the attacker, or else listening for someone to connect. Once this condition is set, an attacker could pwn the computer of the victim using a special kitty's escape code that will run a command in the shell in use. Version 04.7.0 fixes the issue.

HighCVSS 7.4 · v4.0—No exploit Fix available
Published
Jun 12, 2026
Updated
Jun 17, 2026
EPSS
0.4% · 33th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
7.4
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-42850

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
kovidgoyalkitty

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • kovidgoyal kittybefore 0.47.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • kovidgoyal kitty

    • < 0.47.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12kittyfrom 0—
Debian:13kittybefore 0.41.1-2+deb13u20.41.1-2+deb13u2
Debian:14kittybefore 0.47.0-10.47.0-1
openSUSE:Leap 16.0kittybefore 0.48.2-bp160.1.10.48.2-bp160.1.1

Same product

kovidgoyal: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-35605The Graphics Protocol feature in graphics.c in kitty before 0.19.3 allows remote attackers to execute arbitrary code because a filename cont
    40Plan
  • CVE-2026-33642Kitty has a Heap Buffer Over-Read/Write via Integer Overflow in compose_rectangles Bounds Check
    39Monitor
  • CVE-2026-33633Kitty has a Heap Buffer Overflow in its Graphics Protocol Handler
    35Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-43929Apr 19, 2025 · open_actions.py in kitty before 0.41.0 does not ask for user confirmation before running a local executable file that may have been linked f
    31Monitor
  • Later →CVE-2026-42851Jun 12, 2026 · @kitty-edit DCS + --color=geninclude vulnerable to Unauthenticated in-process RCE
    31Monitor
  • Later →CVE-2026-54055Jun 12, 2026 · Kitty has an Arbitrary File Write via Symlink Race Condition in File Transmission Protocol
    20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:kitty0.41.1-2+deb13u2 · Debian:13Package registry (OSV)
opensuse:kitty0.48.2-bp160.1.1 · openSUSE:Leap 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-7291359 days apartKitty: Command injection into the child shell via chained @kitty-echo + @kitty-ssh DCS escape sequences
    29Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
A
Scope
X

Weakness class (CWE)

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/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-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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