CVE-2026-65976

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (37th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Deskflow is a keyboard and mouse sharing app. From 1.17.0 until continuous build 1.26.0.300, a connected peer can send repeated DCLP DataChunk messages to ClipboardChunk::assemble() in src/lib/deskflow/ClipboardChunk.cpp, causing the server path in src/lib/server/ClientProxy1_6.cpp or client path in src/lib/client/ServerProxy.cpp to append data beyond the DataStart declared size and configured clipboard limit before DataEnd validation, exhausting receiver memory. This issue is fixed in continuous build 1.26.0.300.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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 (value × EchelonGraph’s weight)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 17, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 17, 2026
Patch available. Sources: github, github_commit.
GitHub commit

commit bcd3a658fc3b (deskflow/deskflow)

Fix landed in deskflow/deskflow commit bcd3a658fc3b — awaiting tagged release

https://github.com/deskflow/deskflow/commit/bcd3a658fc3b2ad735146fdc9efefa9462d195b7
GitHub commit

commit 8a535fd5dd48 (deskflow/deskflow)

Fix landed in deskflow/deskflow commit 8a535fd5dd48 — awaiting tagged release

https://github.com/deskflow/deskflow/commit/8a535fd5dd48315eaaf6b93d5c7534d0592addef
GitHub advisoryMentions a patch (unverified)

Clipboard receiver can accumulate data beyond Deskflow's configured clipboard size limit · Advisory · deskflow/deskflow · GitHub

https://github.com/deskflow/deskflow/security/advisories/GHSA-jf7g-qghg-p54x

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
deskflow1.22.0+dfsg-7 ... 1.26.0+dfsg-5 (13 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
deskflow1.22.0+dfsg-7 ... 1.26.0+dfsg-3 (11 versions)
  • every version up to 1.26.0+dfsg-4: fixed in 1.26.0+dfsg-4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  3. 2026-10-12 15:46 UTCEG score recompute
  4. 2026-10-11 19:31 UTCEG score recompute
  5. 2026-10-11 16:46 UTCEG score recompute
  6. 2026-10-11 14:07 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-07 11:25 UTCEG score recompute
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-06 09:01 UTCEG score recompute
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  17. 2026-10-03 17:46 UTCEG score recompute
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-10-02 15:44 UTCEG score recompute
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  22. 2026-10-01 12:07 UTCEG score recompute
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  24. 2026-09-30 09:58 UTCEG score recompute
  25. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 36th percentile
Show 59 more
  1. 2026-09-28 09:51 UTCEG score recompute
  2. 2026-09-27 08:04 UTCEG score recompute
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  4. 2026-09-25 01:59 UTCEG score recompute
  5. 2026-09-22 22:22 UTCEG score recompute
  6. 2026-09-21 20:31 UTCEG score recompute
  7. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-09-19 16:07 UTCEG score recompute
  9. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-09-18 13:47 UTCEG score recompute
  11. 2026-09-17 12:00 UTCEG score recompute
  12. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-09-16 10:13 UTCEG score recompute
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  15. 2026-09-15 07:51 UTCEG score recompute
  16. 2026-09-14 06:04 UTCEG score recompute
  17. 2026-09-13 04:17 UTCEG score recompute
  18. 2026-09-12 02:29 UTCEG score recompute
  19. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  20. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  21. 2026-09-11 00:42 UTCEG score recompute
  22. 2026-09-09 03:37 UTCEG score recompute
  23. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  24. 2026-09-07 07:09 UTCEG score recompute
  25. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  26. 2026-09-06 05:20 UTCEG score recompute
  27. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  28. 2026-09-05 03:33 UTCEG score recompute
  29. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  30. 2026-09-02 23:56 UTCEG score recompute
  31. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  32. 2026-09-01 22:08 UTCEG score recompute
  33. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  34. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  35. 2026-08-31 20:20 UTCEG score recompute
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  37. 2026-08-30 16:25 UTCEG score recompute
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  39. 2026-08-29 14:38 UTCEG score recompute
  40. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  41. 2026-08-28 10:43 UTCEG score recompute
  42. 2026-08-27 08:55 UTCEG score recompute
  43. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  44. 2026-08-26 07:08 UTCEG score recompute
  45. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  46. 2026-08-25 05:18 UTCEG score recompute
  47. 2026-08-23 01:44 UTCEG score recompute
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  49. 2026-08-21 23:53 UTCEG score recompute
  50. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  51. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  52. 2026-08-19 20:13 UTCEG score recompute
  53. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  54. 2026-08-18 18:25 UTCEG score recompute
  55. 2026-08-18 18:00 UTCEG score recompute
  56. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  57. 2026-08-17 21:30 UTCEG score recompute
  58. 2026-08-17 21:06 UTCEG score recomputeFirst assessed: 6.5 MEDIUM
  59. 2026-08-17 21:04 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-65976?
CVE-2026-65976 is a medium-severity vulnerability; its CVE record was published on August 17, 2026. Deskflow is a keyboard and mouse sharing app. From 1.17.0 until continuous build 1.26.0.300, a connected peer can send repeated DCLP DataChunk messages to ClipboardChunk::assemble() in src/lib/deskflow/ClipboardChunk.cpp, causing the server path in src/lib/server/ClientProxy1_6.cpp or client path…
When was the CVE record for CVE-2026-65976 published?
The CVE record for CVE-2026-65976 was published on August 17, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-65976 actively exploited?
CVE-2026-65976 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-65976?
CVE-2026-65976 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-65976?
A fix for CVE-2026-65976 is available: update to the fixed version the vendor names in its advisory.

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