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: <0.1%CVSS: 5.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
5.0MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100

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%
EPSS PROB
<0.1%
EPSS %ILE
below the 1st
KEV
Not listed

Published

June 12, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

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 rangeFix by version rangeDependents
kitty0.19.3-1 ... 0.48.2-1 (47 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
kitty0.26.5-5 ... 0.48.2-1.1 (40 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
kitty0.41.1-2, 0.41.1-2+deb13u1
  • every version up to 0.41.1-2+deb13u2: fixed in 0.41.1-2+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
kitty0.41.1-2 ... 0.47.0-3 (12 versions)
  • every version up to 0.47.3-1: fixed in 0.47.3-1
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 17× 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. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-06 15:18 UTCEPSS rescore
  5. 2026-10-05 17:43 UTCEPSS rescore
  6. 2026-10-03 08:39 UTCOSV refresh
  7. 2026-10-01 19:50 UTCEPSS rescore
  8. 2026-09-30 15:03 UTCEPSS rescore
  9. 2026-09-29 15:22 UTCEPSS rescore
  10. 2026-09-26 15:59 UTCEPSS rescore
  11. 2026-09-24 14:04 UTCEPSS rescore
  12. 2026-09-23 17:54 UTCEPSS rescore
  13. 2026-09-18 19:28 UTCEPSS rescore
  14. 2026-09-17 19:31 UTCEPSS rescore
  15. 2026-09-16 14:08 UTCEPSS rescore
  16. 2026-09-14 03:57 UTCEG score recompute
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-10 09:35 UTCEPSS rescore
  19. 2026-08-30 23:36 UTCEG score recompute
  20. 2026-08-28 21:41 UTCEPSS rescore
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-24 23:44 UTCEG score recompute
  23. 2026-08-23 09:59 UTCEG score recompute
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-20 12:31 UTCEG score recompute
Show 43 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-15 23:36 UTCEG score recompute
  3. 2026-08-09 12:01 UTCEG score recompute
  4. 2026-08-08 16:37 UTCEPSS rescore
  5. 2026-08-06 17:56 UTCEG score recompute
  6. 2026-08-06 13:47 UTCEPSS rescore
  7. 2026-08-05 19:55 UTCEG score recompute
  8. 2026-08-05 19:17 UTCEPSS rescore
  9. 2026-08-02 07:16 UTCEG score recompute
  10. 2026-08-02 02:27 UTCEPSS rescore
  11. 2026-08-01 09:14 UTCEG score recompute
  12. 2026-08-01 04:16 UTCEPSS rescore
  13. 2026-07-31 04:38 UTCEG score recompute
  14. 2026-07-30 16:28 UTCEPSS rescore
  15. 2026-07-26 20:31 UTCEG score recompute
  16. 2026-07-26 14:54 UTCEPSS rescore
  17. 2026-07-24 14:18 UTCEPSS rescore
  18. 2026-07-23 03:19 UTCEG score recompute
  19. 2026-07-22 14:08 UTCEPSS rescore
  20. 2026-07-21 15:25 UTCEPSS rescore
  21. 2026-07-18 10:04 UTCEPSS rescore
  22. 2026-07-11 08:27 UTCEPSS rescore
  23. 2026-07-11 08:27 UTCEPSS rescore
  24. 2026-07-08 15:16 UTCEPSS rescore
  25. 2026-07-08 15:16 UTCEPSS rescore
  26. 2026-07-07 13:46 UTCEPSS rescore
  27. 2026-07-07 13:46 UTCEPSS rescore
  28. 2026-07-06 02:23 UTCEPSS rescore
  29. 2026-07-06 02:23 UTCEPSS rescore
  30. 2026-07-01 15:07 UTCEPSS rescore
  31. 2026-06-28 04:56 UTCEPSS rescore
  32. 2026-06-28 04:56 UTCEPSS rescore
  33. 2026-06-27 03:08 UTCEPSS rescore
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-17 17:53 UTCEPSS rescore
  36. 2026-06-16 17:53 UTCEPSS rescore
  37. 2026-06-15 17:49 UTCEPSS rescore
  38. 2026-06-15 17:49 UTCEPSS rescore
  39. 2026-06-14 23:18 UTCEPSS rescore
  40. 2026-06-13 23:00 UTCEPSS rescore
  41. 2026-06-12 23:12 UTCEPSS rescore
  42. 2026-06-12 22:15 UTCEG score recompute
  43. 2026-06-12 22:13 UTCNVD updatefirst tracked

Related CVEs(same product + 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 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 <0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54055?
CVE-2026-54055 has a CVSS base score of 5.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54055?
A fix for CVE-2026-54055 is available: update to the fixed version the vendor names in its advisory.

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