CVE-2026-52720

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-15. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
38.5%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 30, 2026

Advisory Details (3)

Auto-updated Jun 15, 2026
Patch available. Sources: redhat.
generic

GStreamer / gstreamer · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5105
redhat

2486731 – (CVE-2026-52720) CVE-2026-52720 gstreamer1-plugins-bad-free: GStreamer: Heap buffer overflow via crafted VNC server rectangle in librfb

https://bugzilla.redhat.com/show_bug.cgi?id=2486731
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-52720

Vendor Advisories for CVE-2026-52720(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 31× in last 7d / 115× 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 115 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-52720?
CVE-2026-52720 is a high vulnerability published on June 15, 2026. A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a…
When was CVE-2026-52720 disclosed?
CVE-2026-52720 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52720 actively exploited?
CVE-2026-52720 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52720?
CVE-2026-52720 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-52720?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52720, 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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