CVE-2026-59691

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-09. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 30, 2026

Advisory Details (4)

Auto-updated Jul 9, 2026
Patch available. Sources: redhat.
generic

GStreamer / gstreamer · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5173
generic

Sign in · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100
redhat

2497343 – (CVE-2026-59691) CVE-2026-59691 gstreamer: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer

https://bugzilla.redhat.com/show_bug.cgi?id=2497343
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-59691

Vendor Advisories for CVE-2026-59691(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatgstreamer1-plugins-bad-free-0:1.16.1-9.el8_10.12026-07-30redhat
redhatgstreamer1-plugins-bad-free-0:1.26.7-2.el10_2.62026-07-28redhat

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 33× in last 7d / 73× 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. 2026-07-30 19:10 UTCEG score recompute
  2. 2026-07-30 19:10 UTCVendor advisory
  3. 2026-07-30 19:10 UTCGHSA enrichment
  4. 2026-07-30 16:28 UTCEPSS rescore
  5. 2026-07-30 06:39 UTCEG score recompute
  6. 2026-07-30 06:39 UTCVendor advisory
  7. 2026-07-30 06:39 UTCGHSA enrichment
  8. 2026-07-30 01:30 UTCEPSS rescore
  9. 2026-07-30 01:30 UTCEPSS rescore
  10. 2026-07-29 21:15 UTCVendor advisory
  11. 2026-07-29 21:15 UTCGHSA enrichment
  12. 2026-07-29 08:44 UTCVendor advisory
  13. 2026-07-29 08:44 UTCGHSA enrichment
  14. 2026-07-28 21:26 UTCEG score recompute
  15. 2026-07-28 21:26 UTCGHSA enrichment
  16. 2026-07-28 20:39 UTCEG score recompute
  17. 2026-07-28 20:38 UTCGHSA enrichment
  18. 2026-07-28 15:37 UTCEPSS rescore
  19. 2026-07-28 09:32 UTCGHSA enrichment
  20. 2026-07-27 22:15 UTCEG score recompute
  21. 2026-07-27 22:15 UTCGHSA enrichment
  22. 2026-07-27 14:14 UTCEPSS rescore
  23. 2026-07-27 10:57 UTCGHSA enrichment
  24. 2026-07-26 23:38 UTCEG score recompute
  25. 2026-07-26 23:38 UTCGHSA enrichment
Show 48 more
  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-26 12:21 UTCEG score recompute
  4. 2026-07-26 12:21 UTCGHSA enrichment
  5. 2026-07-25 14:18 UTCEPSS rescore
  6. 2026-07-25 14:18 UTCEPSS rescore
  7. 2026-07-24 14:18 UTCEPSS rescore
  8. 2026-07-24 14:18 UTCEPSS rescore
  9. 2026-07-23 14:18 UTCEPSS rescore
  10. 2026-07-23 14:18 UTCEPSS rescore
  11. 2026-07-23 03:21 UTCEG score recompute
  12. 2026-07-22 14:08 UTCEPSS rescore
  13. 2026-07-22 14:08 UTCEPSS rescore
  14. 2026-07-21 15:25 UTCEPSS rescore
  15. 2026-07-21 15:25 UTCEPSS rescore
  16. 2026-07-20 17:08 UTCEPSS rescore
  17. 2026-07-19 14:31 UTCEPSS rescore
  18. 2026-07-19 02:29 UTCEPSS rescore
  19. 2026-07-18 10:04 UTCEPSS rescore
  20. 2026-07-16 23:27 UTCGHSA enrichment
  21. 2026-07-16 17:03 UTCEPSS rescore
  22. 2026-07-16 12:09 UTCGHSA enrichment
  23. 2026-07-16 00:52 UTCGHSA enrichment
  24. 2026-07-15 16:57 UTCEPSS rescore
  25. 2026-07-15 16:57 UTCEPSS rescore
  26. 2026-07-15 13:34 UTCGHSA enrichment
  27. 2026-07-15 02:15 UTCGHSA enrichment
  28. 2026-07-15 02:00 UTCEPSS rescore
  29. 2026-07-15 02:00 UTCEPSS rescore
  30. 2026-07-14 14:57 UTCGHSA enrichment
  31. 2026-07-14 03:40 UTCGHSA enrichment
  32. 2026-07-13 22:31 UTCEPSS rescore
  33. 2026-07-13 16:22 UTCGHSA enrichment
  34. 2026-07-13 06:13 UTCEPSS rescore
  35. 2026-07-13 06:13 UTCEPSS rescore
  36. 2026-07-13 05:01 UTCGHSA enrichment
  37. 2026-07-12 17:42 UTCGHSA enrichment
  38. 2026-07-12 06:24 UTCGHSA enrichment
  39. 2026-07-12 05:46 UTCEPSS rescore
  40. 2026-07-11 19:06 UTCGHSA enrichment
  41. 2026-07-11 08:27 UTCEPSS rescore
  42. 2026-07-11 08:27 UTCEPSS rescore
  43. 2026-07-11 07:48 UTCGHSA enrichment
  44. 2026-07-10 20:30 UTCGHSA enrichment
  45. 2026-07-10 09:12 UTCGHSA enrichment
  46. 2026-07-09 21:55 UTCGHSA enrichment
  47. 2026-07-09 10:37 UTCEG score recompute
  48. 2026-07-09 10:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-59691?
CVE-2026-59691 is a high vulnerability published on July 9, 2026. A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit…
When was CVE-2026-59691 disclosed?
CVE-2026-59691 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59691 actively exploited?
CVE-2026-59691 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 83.2% of all scored CVEs.
What is the CVSS score of CVE-2026-59691?
CVE-2026-59691 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-59691?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59691, 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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