CVE-2026-54055

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 100% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.0Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The os.open() call used to create files does not use O_NOFOLLOW, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.

CVSS v3
5.0
EG Score
5.0(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity50% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
0%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
Patch available. Sources: github.
github Patch Available

Arbitrary File Write via Symlink Race Condition in File Transmission Protocol · Advisory · kovidgoyal/kitty · GitHub

https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
kitty0.19.3-1 ... 0.48.2-1 (47 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
kitty0.26.5-5 ... 0.48.2-1 (39 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
kitty0.41.1-2 ... 0.48.2-1 (16 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
kitty0.41.1-2 ... 0.47.0-3 (12 versions)0.47.3-1—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-24 23:44 UTCEG score recompute
  3. 2026-08-23 09:59 UTCEG score recompute
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-20 12:31 UTCEG score recompute
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-15 23:36 UTCEG score recompute
  8. 2026-08-09 12:01 UTCEG score recompute
  9. 2026-08-08 16:37 UTCEPSS rescore
  10. 2026-08-06 17:56 UTCEG score recompute
  11. 2026-08-06 13:47 UTCEPSS rescore
  12. 2026-08-05 19:55 UTCEG score recompute
  13. 2026-08-05 19:17 UTCEPSS rescore
  14. 2026-08-02 07:16 UTCEG score recompute
  15. 2026-08-02 02:27 UTCEPSS rescore
  16. 2026-08-01 09:14 UTCEG score recompute
  17. 2026-08-01 04:16 UTCEPSS rescore
  18. 2026-07-31 04:38 UTCEG score recompute
  19. 2026-07-30 16:28 UTCEPSS rescore
  20. 2026-07-26 20:31 UTCEG score recompute
  21. 2026-07-26 14:54 UTCEPSS rescore
  22. 2026-07-24 14:18 UTCEPSS rescore
  23. 2026-07-23 03:19 UTCEG score recompute
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-21 15:25 UTCEPSS rescore
Show 23 more
  1. 2026-07-18 10:04 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-08 15:16 UTCEPSS rescore
  5. 2026-07-08 15:16 UTCEPSS rescore
  6. 2026-07-07 13:46 UTCEPSS rescore
  7. 2026-07-07 13:46 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-01 15:07 UTCEPSS rescore
  11. 2026-06-28 04:56 UTCEPSS rescore
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-27 03:08 UTCEPSS rescore
  14. 2026-06-25 13:49 UTCEPSS rescore
  15. 2026-06-17 17:53 UTCEPSS rescore
  16. 2026-06-16 17:53 UTCEPSS rescore
  17. 2026-06-15 17:49 UTCEPSS rescore
  18. 2026-06-15 17:49 UTCEPSS rescore
  19. 2026-06-14 23:18 UTCEPSS rescore
  20. 2026-06-13 23:00 UTCEPSS rescore
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-12 22:15 UTCEG score recompute
  23. 2026-06-12 22:13 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54055?
CVE-2026-54055 is a medium vulnerability published on June 12, 2026. Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU…
When was CVE-2026-54055 disclosed?
CVE-2026-54055 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54055 actively exploited?
CVE-2026-54055 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 99.9% of all scored CVEs.
What is the CVSS score of CVE-2026-54055?
CVE-2026-54055 has a CVSS v3 base score of 5.0 (NVD).
How do I remediate CVE-2026-54055?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54055, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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