CVE-2026-52720

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-15. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.8Exploit: NoneExposed: 0

A fix is available — apply it.

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(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
41.6%
KEV
Not listed

Published

June 15, 2026

Last Modified

July 16, 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(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatgstreamer1-plugins-bad-free-0:1.16.1-8.el8_102026-07-09redhat
redhatgstreamer1-plugins-bad-free-0:1.22.12-7.el9_8.12026-07-08redhat
redhatgstreamer1-plugins-bad-free-0:1.26.7-2.el10_2.42026-07-08redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 103× 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 136 total refreshes for this CVE.

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

Related CVEs(same vendor + 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 July 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52720 actively exploited?
CVE-2026-52720 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 41.6% 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 v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
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.

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