CVE-2026-91786

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-09-15. A secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in GNOME Shell. When processing icons from a remote search provider via D-Bus, the system fails to validate the icon's declared dimensions against the actual data buffer size. A malicious or compromised remote search provider could exploit this by providing oversized icon dimensions, leading to an out-of-bounds read. This can cause the GNOME Shell process to crash, disrupting the user's session, and potentially disclose sensitive information from adjacent memory.

CVSS v3
6.1
EG Score
6.1MEDIUMhigh confidence
EG Risk
28
EG Risk 28/100CISA SSVC

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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 15, 2026

Last Modified

September 16, 2026

Advisory Details (3)

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

Remote Search Icon-Data Buffer Overread (#9365) · Issues · GNOME / gnome-shell · GitLab

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/9365
redhat

2533606 – (CVE-2026-91786) CVE-2026-91786 gnome-shell: gnome-shell: out-of-bounds read in remote search icon rendering due to unvalidated icon-data buffer size

https://bugzilla.redhat.com/show_bug.cgi?id=2533606
redhat Patch Available

CVE-2026-91786 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-91786

Vendor Advisories for CVE-2026-91786(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gnome-shell43.4-1 ... 51.0-2 (92 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gnome-shell48.3-1 ... 51.0-2 (29 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gnome-shell48.3-1 ... 50.4-1 (24 versions)
  • every version up to 50.5-1: fixed in 50.5-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 61× 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. 2026-10-05 01:56 UTCEG score recompute
  2. 2026-10-05 01:56 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 02:59 UTCEG score recompute
  5. 2026-10-04 02:59 UTCGHSA enrichment
  6. 2026-10-03 04:01 UTCEG score recompute
  7. 2026-10-03 04:01 UTCGHSA enrichment
  8. 2026-10-02 05:02 UTCEG score recompute
  9. 2026-10-02 05:02 UTCGHSA enrichment
  10. 2026-10-01 19:51 UTCEPSS rescore
  11. 2026-10-01 05:00 UTCEG score recompute
  12. 2026-10-01 05:00 UTCGHSA enrichment
  13. 2026-09-30 15:04 UTCEPSS rescore
  14. 2026-09-30 06:02 UTCEG score recompute
  15. 2026-09-30 06:02 UTCGHSA enrichment
  16. 2026-09-29 07:05 UTCEG score recompute
  17. 2026-09-29 07:04 UTCGHSA enrichment
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 08:05 UTCEG score recompute
  21. 2026-09-28 08:05 UTCGHSA enrichment
  22. 2026-09-27 13:49 UTCEPSS rescore
  23. 2026-09-27 09:03 UTCEG score recompute
  24. 2026-09-27 09:03 UTCGHSA enrichment
  25. 2026-09-26 15:59 UTCEPSS rescore
Show 36 more
  1. 2026-09-26 10:05 UTCEG score recompute
  2. 2026-09-26 10:05 UTCGHSA enrichment
  3. 2026-09-25 11:01 UTCEG score recompute
  4. 2026-09-25 11:01 UTCGHSA enrichment
  5. 2026-09-24 14:04 UTCEPSS rescore
  6. 2026-09-24 12:04 UTCEG score recompute
  7. 2026-09-24 12:04 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 13:06 UTCEG score recompute
  10. 2026-09-23 13:06 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 14:08 UTCEG score recompute
  13. 2026-09-22 14:08 UTCGHSA enrichment
  14. 2026-09-21 21:09 UTCEPSS rescore
  15. 2026-09-21 15:11 UTCEG score recompute
  16. 2026-09-21 15:11 UTCGHSA enrichment
  17. 2026-09-20 20:16 UTCEPSS rescore
  18. 2026-09-20 16:14 UTCGHSA enrichment
  19. 2026-09-19 17:17 UTCEG score recompute
  20. 2026-09-19 17:17 UTCGHSA enrichment
  21. 2026-09-18 19:28 UTCEPSS rescore
  22. 2026-09-18 18:20 UTCEG score recompute
  23. 2026-09-18 18:20 UTCGHSA enrichment
  24. 2026-09-17 19:32 UTCEPSS rescore
  25. 2026-09-17 19:23 UTCGHSA enrichment
  26. 2026-09-16 19:58 UTCEG score recompute
  27. 2026-09-16 19:58 UTCGHSA enrichment
  28. 2026-09-16 14:09 UTCEPSS rescore
  29. 2026-09-16 13:49 UTCGHSA enrichment
  30. 2026-09-15 14:32 UTCEG score recompute
  31. 2026-09-15 14:32 UTCGHSA enrichment
  32. 2026-09-15 13:58 UTCEG score recompute
  33. 2026-09-15 13:58 UTCGHSA enrichment
  34. 2026-09-15 11:29 UTCEG score recompute
  35. 2026-09-15 11:03 UTCEG score recompute
  36. 2026-09-15 11:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91786?
CVE-2026-91786 is a medium vulnerability published on September 15, 2026. A flaw was found in GNOME Shell. When processing icons from a remote search provider via D-Bus, the system fails to validate the icon's declared dimensions against the actual data buffer size. A malicious or compromised remote search provider could exploit this by providing oversized icon…
When was CVE-2026-91786 disclosed?
CVE-2026-91786 was first published on September 15, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91786 actively exploited?
CVE-2026-91786 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-91786?
CVE-2026-91786 has a CVSS base score of 6.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-91786?
A fix for CVE-2026-91786 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-91786 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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