CVE-2026-84268

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-01. 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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause read_reply() to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing the operation to write past the intended boundaries. This issue allows a malicious server to corrupt adjacent heap memory in the gvfsd-sftp process, resulting in a denial of service as the process aborts upon detecting the heap corruption or potentially allowing arbitrary code execution.

CVSS v3
8.8
EG Score
8.8(high)
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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 2, 2026

Advisory Details (3)

Auto-updated Sep 1, 2026
Patch available. Sources: redhat.
generic

gvfs SFTP backend: unclamped heap buffer overflow in read_reply() (reliable DoS, bounded code-execution primitive) (#862) · Issues · GNOME / gvfs · GitLab

https://gitlab.gnome.org/GNOME/gvfs/-/issues/862
redhat

Bug Access Denied

https://bugzilla.redhat.com/show_bug.cgi?id=2526485
redhat Patch Available

CVE-2026-84268 - 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-2026-84268

Vendor Advisories for CVE-2026-84268(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 rangeFixed inDependents
gvfs1.50.3-1 ... 1.60.0-2 (39 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
gvfs1.57.2-2 ... 1.60.0-2 (11 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
gvfs1.57.2-2 ... 1.60.0-2 (10 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 28× in last 7d / 80× 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. 2026-09-21 01:39 UTCEG score recompute
  2. 2026-09-21 01:39 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 13:34 UTCGHSA enrichment
  5. 2026-09-20 01:30 UTCEG score recompute
  6. 2026-09-20 01:30 UTCGHSA enrichment
  7. 2026-09-19 13:25 UTCGHSA enrichment
  8. 2026-09-19 01:21 UTCEG score recompute
  9. 2026-09-19 01:20 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 13:16 UTCGHSA enrichment
  12. 2026-09-18 01:12 UTCEG score recompute
  13. 2026-09-18 01:12 UTCGHSA enrichment
  14. 2026-09-17 19:32 UTCEPSS rescore
  15. 2026-09-17 13:07 UTCGHSA enrichment
  16. 2026-09-17 01:03 UTCEG score recompute
  17. 2026-09-17 01:03 UTCGHSA enrichment
  18. 2026-09-16 14:09 UTCEPSS rescore
  19. 2026-09-16 12:58 UTCEG score recompute
  20. 2026-09-16 12:58 UTCGHSA enrichment
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-16 00:54 UTCGHSA enrichment
  23. 2026-09-15 12:49 UTCEG score recompute
  24. 2026-09-15 12:49 UTCGHSA enrichment
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 55 more
  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-15 00:44 UTCGHSA enrichment
  3. 2026-09-14 12:39 UTCGHSA enrichment
  4. 2026-09-14 00:23 UTCEG score recompute
  5. 2026-09-14 00:23 UTCGHSA enrichment
  6. 2026-09-13 12:19 UTCGHSA enrichment
  7. 2026-09-13 00:14 UTCEG score recompute
  8. 2026-09-13 00:14 UTCGHSA enrichment
  9. 2026-09-12 12:09 UTCGHSA enrichment
  10. 2026-09-12 00:04 UTCEG score recompute
  11. 2026-09-12 00:04 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 11:59 UTCEG score recompute
  15. 2026-09-11 11:59 UTCGHSA enrichment
  16. 2026-09-10 23:54 UTCGHSA enrichment
  17. 2026-09-10 11:43 UTCEG score recompute
  18. 2026-09-10 11:43 UTCGHSA enrichment
  19. 2026-09-09 23:37 UTCGHSA enrichment
  20. 2026-09-09 11:28 UTCGHSA enrichment
  21. 2026-09-08 23:23 UTCEG score recompute
  22. 2026-09-08 23:23 UTCGHSA enrichment
  23. 2026-09-08 22:01 UTCEPSS rescore
  24. 2026-09-08 03:35 UTCEG score recompute
  25. 2026-09-08 03:35 UTCGHSA enrichment
  26. 2026-09-07 15:31 UTCGHSA enrichment
  27. 2026-09-07 03:25 UTCGHSA enrichment
  28. 2026-09-06 15:21 UTCEG score recompute
  29. 2026-09-06 15:21 UTCGHSA enrichment
  30. 2026-09-06 13:48 UTCEPSS rescore
  31. 2026-09-06 03:15 UTCEG score recompute
  32. 2026-09-06 03:15 UTCGHSA enrichment
  33. 2026-09-05 15:31 UTCEPSS rescore
  34. 2026-09-05 15:11 UTCGHSA enrichment
  35. 2026-09-05 03:04 UTCGHSA enrichment
  36. 2026-09-04 14:56 UTCEG score recompute
  37. 2026-09-04 14:56 UTCGHSA enrichment
  38. 2026-09-04 05:07 UTCEPSS rescore
  39. 2026-09-04 02:50 UTCGHSA enrichment
  40. 2026-09-03 14:44 UTCGHSA enrichment
  41. 2026-09-03 02:37 UTCGHSA enrichment
  42. 2026-09-02 14:31 UTCEG score recompute
  43. 2026-09-02 14:31 UTCGHSA enrichment
  44. 2026-09-02 14:12 UTCEPSS rescore
  45. 2026-09-02 13:52 UTCEG score recompute
  46. 2026-09-02 13:52 UTCGHSA enrichment
  47. 2026-09-02 09:13 UTCGHSA enrichment
  48. 2026-09-01 21:08 UTCGHSA enrichment
  49. 2026-09-01 19:30 UTCEG score recompute
  50. 2026-09-01 19:30 UTCGHSA enrichment
  51. 2026-09-01 18:24 UTCEG score recompute
  52. 2026-09-01 17:42 UTCEG score recompute
  53. 2026-09-01 16:25 UTCEG score recompute
  54. 2026-09-01 15:44 UTCEG score recompute
  55. 2026-09-01 15:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84268?
CVE-2026-84268 is a high vulnerability published on September 1, 2026. A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause read_reply() to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size,…
When was CVE-2026-84268 disclosed?
CVE-2026-84268 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84268 actively exploited?
CVE-2026-84268 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 73.9% of all scored CVEs.
What is the CVSS score of CVE-2026-84268?
CVE-2026-84268 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-84268?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84268, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-84268

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