CVE-2026-53703

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-15. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated 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 vulnerability was found in the GStreamer RealMedia demuxer (gst-plugins-ugly). When processing a RealMedia (.rm) file, the demuxer parses MDPR (media properties) chunks to configure audio streams. For audio stream header versions 4 and 5, the parser reads fields such as codec type, packet size, sample rate, channel count, and extra codec data length from fixed offsets within the chunk without first checking that the chunk contains enough data. If a malicious file provides an MDPR chunk that is too small to contain a complete audio stream header, the parser reads beyond the end of the buffer. This can cause the application to crash. In some cases, bytes read past the buffer boundary may be incorporated into stream metadata, which could result in limited information disclosure.

CVSS v3
7.1
EG Score
7.1(medium)
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
16%
KEV
Not listed

Published

June 15, 2026

Last Modified

August 5, 2026

Advisory Details (2)

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

2487613 – (CVE-2026-53703) CVE-2026-53703 gstreamer1-plugins-ugly-free: GStreamer: Out-of-bounds read in RealMedia demuxer audio stream header parser

https://bugzilla.redhat.com/show_bug.cgi?id=2487613
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-53703

Vendor Advisories for CVE-2026-53703(5)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatgstreamer1-plugins-ugly-free-0:1.24.11-1.el10_0.22026-08-05redhat
redhatgstreamer1-plugins-ugly-free-0:1.22.12-4.el9_6.12026-08-05redhat
redhatgstreamer1-plugins-ugly-free-0:1.26.7-2.el10_2.12026-07-08redhat
redhatgstreamer1-plugins-ugly-free-0:1.22.12-6.el9_8.12026-07-08redhat

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
gst-plugins-ugly1.01.18.4-2 ... 1.29.2-1 (72 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
gst-plugins-ugly1.01.22.0-2 ... 1.29.2-1 (63 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
gst-plugins-ugly1.01.26.10-1 ... 1.29.2-1 (24 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
gst-plugins-ugly1.01.26.10-1 ... 1.28.3-1 (18 versions)1.28.4-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 51× 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 311 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-53703?
CVE-2026-53703 is a high vulnerability published on June 15, 2026. A vulnerability was found in the GStreamer RealMedia demuxer (gst-plugins-ugly). When processing a RealMedia (.rm) file, the demuxer parses MDPR (media properties) chunks to configure audio streams. For audio stream header versions 4 and 5, the parser reads fields such as codec type, packet size,…
When was CVE-2026-53703 disclosed?
CVE-2026-53703 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53703 actively exploited?
CVE-2026-53703 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 84.3% of all scored CVEs.
What is the CVSS score of CVE-2026-53703?
CVE-2026-53703 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-53703?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53703, 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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