CVE-2026-33633

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 70% 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, nvd
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Kitty is a cross-platform GPU based terminal. Versions 0.46.2 and below contain a heap buffer overflow in load_image_data() that allows any process which can write to the terminal's stdin to crash kitty immediately. The vulnerability is triggered by a single APC graphics protocol command with a PNG format declaration (f=100) whose payload exceeds twice the initial buffer capacity. The overflow is attacker-controlled in both length and content, causing DoS and potentially escalation to RCE itself. This issue has been fixed in version 0.47.0.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

May 19, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated May 19, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Heap Buffer Overflow in Kitty Graphics Protocol Handler · Advisory · kovidgoyal/kitty · GitHub

https://github.com/kovidgoyal/kitty/security/advisories/GHSA-j68c-v8x4-269g
generic

Graphics protocol: Fix crash when handling invalid offset values in g… · kovidgoyal/kitty@e9661f0 · GitHub

https://github.com/kovidgoyal/kitty/commit/e9661f0f3afb4e4dbffa509adfb3df3c9780ad34

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntukitty-terminfo (0.45.0-1ubuntu0.1~esm1) @ resolute2026-08-23ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

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
kitty0.41.1-20.41.1-2+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
kitty0.41.1-2 ... 0.46.2-1 (9 versions)0.47.0-1—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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.

Showing the most recent 100 of 212 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 19:30 UTCEPSS rescore
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 03:11 UTCEPSS rescore
  8. 2026-09-13 16:47 UTCEPSS rescore
  9. 2026-09-12 15:01 UTCEPSS rescore
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 09:37 UTCEPSS rescore
  12. 2026-09-11 05:53 UTCOSV refresh
  13. 2026-09-10 09:34 UTCEPSS rescore
  14. 2026-09-08 22:00 UTCEPSS rescore
  15. 2026-09-07 16:01 UTCEPSS rescore
  16. 2026-09-06 13:47 UTCEPSS rescore
  17. 2026-09-04 05:06 UTCEPSS rescore
  18. 2026-09-02 14:11 UTCEPSS rescore
  19. 2026-09-01 13:53 UTCEPSS rescore
  20. 2026-09-01 04:39 UTCEPSS rescore
  21. 2026-09-01 04:39 UTCEPSS rescore
  22. 2026-08-30 19:17 UTCEPSS rescore
  23. 2026-08-30 01:22 UTCEPSS rescore
  24. 2026-08-28 21:41 UTCEPSS rescore
  25. 2026-08-27 14:25 UTCEPSS rescore
Show 75 more
  1. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-24 14:17 UTCEPSS rescore
  4. 2026-08-23 17:00 UTCEG score recompute
  5. 2026-08-23 17:00 UTCVendor advisory
  6. 2026-08-23 00:19 UTCEPSS rescore
  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-21 23:37 UTCEG score recompute
  9. 2026-08-21 23:37 UTCVendor advisory
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-20 19:01 UTCEG score recompute
  13. 2026-08-20 19:01 UTCVendor advisory
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 09:59 UTCVendor advisory
  18. 2026-08-16 16:56 UTCEG score recompute
  19. 2026-08-16 16:56 UTCVendor advisory
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 03:34 UTCEG score recompute
  22. 2026-08-16 03:34 UTCVendor advisory
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 01:49 UTCEG score recompute
  25. 2026-08-15 01:49 UTCVendor advisory
  26. 2026-08-15 01:30 UTCEPSS rescore
  27. 2026-08-14 13:58 UTCVendor advisory
  28. 2026-08-14 02:06 UTCEG score recompute
  29. 2026-08-14 02:06 UTCVendor advisory
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 02:13 UTCVendor advisory
  32. 2026-08-12 14:21 UTCEG score recompute
  33. 2026-08-12 14:21 UTCVendor advisory
  34. 2026-08-12 13:50 UTCEPSS rescore
  35. 2026-08-12 01:45 UTCVendor advisory
  36. 2026-08-11 13:53 UTCEG score recompute
  37. 2026-08-11 13:53 UTCVendor advisory
  38. 2026-08-11 01:03 UTCEG score recompute
  39. 2026-08-11 01:03 UTCVendor advisory
  40. 2026-08-11 00:00 UTCEPSS rescore
  41. 2026-08-10 13:10 UTCVendor advisory
  42. 2026-08-10 01:18 UTCEG score recompute
  43. 2026-08-10 01:18 UTCVendor advisory
  44. 2026-08-09 13:46 UTCEPSS rescore
  45. 2026-08-09 13:26 UTCVendor advisory
  46. 2026-08-09 01:35 UTCEG score recompute
  47. 2026-08-09 01:35 UTCVendor advisory
  48. 2026-08-08 16:37 UTCEPSS rescore
  49. 2026-08-08 08:40 UTCVendor advisory
  50. 2026-08-07 20:48 UTCEG score recompute
  51. 2026-08-07 20:48 UTCVendor advisory
  52. 2026-08-07 08:56 UTCVendor advisory
  53. 2026-08-06 21:04 UTCEG score recompute
  54. 2026-08-06 21:04 UTCVendor advisory
  55. 2026-08-06 13:46 UTCEPSS rescore
  56. 2026-08-06 09:12 UTCVendor advisory
  57. 2026-08-05 21:20 UTCEG score recompute
  58. 2026-08-05 21:20 UTCVendor advisory
  59. 2026-08-05 19:17 UTCEPSS rescore
  60. 2026-08-04 15:10 UTCEPSS rescore
  61. 2026-08-04 10:38 UTCEPSS rescore
  62. 2026-08-04 04:50 UTCVendor advisory
  63. 2026-08-03 16:58 UTCEG score recompute
  64. 2026-08-03 16:58 UTCVendor advisory
  65. 2026-08-03 10:36 UTCEPSS rescore
  66. 2026-08-02 17:38 UTCVendor advisory
  67. 2026-08-02 05:46 UTCEG score recompute
  68. 2026-08-02 05:46 UTCVendor advisory
  69. 2026-08-02 02:27 UTCEPSS rescore
  70. 2026-08-01 17:53 UTCEG score recompute
  71. 2026-08-01 17:53 UTCVendor advisory
  72. 2026-08-01 04:16 UTCEPSS rescore
  73. 2026-07-30 16:28 UTCEPSS rescore
  74. 2026-07-30 01:30 UTCEPSS rescore
  75. 2026-07-27 14:13 UTCEPSS rescore

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ubuntu:USN-8442-1

Frequently asked(5)

What is CVE-2026-33633?
CVE-2026-33633 is a high vulnerability published on May 19, 2026. Kitty is a cross-platform GPU based terminal. Versions 0.46.2 and below contain a heap buffer overflow in loadimagedata() that allows any process which can write to the terminal's stdin to crash kitty immediately. The vulnerability is triggered by a single APC graphics protocol command with a PNG…
When was CVE-2026-33633 disclosed?
CVE-2026-33633 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33633 actively exploited?
CVE-2026-33633 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 68.4% of all scored CVEs.
What is the CVSS score of CVE-2026-33633?
CVE-2026-33633 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-33633?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33633, 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.

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