CVE-2026-53794

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (41st 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
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

rsync before 3.5.0 contains a logic error in --max-alloc handling that allows a sender or configuration setting --max-alloc=0 to disable allocation sanity checks entirely rather than enforcing a zero-byte cap. Attackers can exploit this flaw to cause the receiver to attempt unbounded memory allocations for file list and data structures, potentially exhausting available memory and causing a denial of service.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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 13, 2026

Last Modified

September 8, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
Patch available. Sources: github, github_release.
Web page

rsync < 3.5.0 Denial of Service via --max-alloc=0 Logic Error | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rsync-denial-of-service-via-max-alloc-0-logic-error
GitHub advisoryMentions a patch (unverified)

rsync: remote peer disables the per-allocation sanity cap via --max-alloc=0 · Advisory · RsyncProject/rsync · GitHub

Affected: 3.5.0. (Precise introduced-in ranges being finalised.)

https://github.com/RsyncProject/rsync/security/advisories/GHSA-p827-vwcp-m964
GitHub release Patch Available

v3.5.0

Patch available: RsyncProject/rsync v3.5.0

https://github.com/RsyncProject/rsync/releases/tag/v3.5.0

Vendor Advisories for CVE-2026-53794(1)

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

Affected Packages

(7 across 7 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.5.0-r0: fixed in 3.5.0-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.5.0-r0: fixed in 3.5.0-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.5.0-r0: fixed in 3.5.0-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.5.0-r0: fixed in 3.5.0-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
rsync3.2.7-1 ... 3.5.1+ds1-1 (32 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
rsync3.4.1+ds1-5 ... 3.4.4+ds1-1 (13 versions)
  • every version up to 3.5.0+ds1-0+deb13u1: fixed in 3.5.0+ds1-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
rsync3.4.1+ds1-5 ... 3.4.4+ds1-1 (9 versions)
  • every version up to 3.5.0+ds1-1: fixed in 3.5.0+ds1-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× 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.

Showing the most recent 100 of 103 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 3 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-10-12 15:57 UTCEG score recompute
  4. 2026-10-11 19:40 UTCEG score recompute
  5. 2026-10-11 16:55 UTCEG score recompute
  6. 2026-10-11 14:18 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-06 13:25 UTCEG score recompute
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-10-03 19:49 UTCEG score recompute
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-10-02 07:34 UTCEG score recompute
  20. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-09-30 21:47 UTCEG score recompute
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-09-28 09:19 UTCEG score recompute
Show 75 more
  1. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-09-27 09:45 UTCEG score recompute
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-09-25 03:33 UTCEG score recompute
  5. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-09-23 23:32 UTCEG score recompute
  7. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-09-22 23:49 UTCEG score recompute
  9. 2026-09-21 23:45 UTCEG score recompute
  10. 2026-09-21 00:09 UTCEG score recompute
  11. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-09-19 23:39 UTCEG score recompute
  13. 2026-09-19 00:03 UTCEG score recompute
  14. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-09-18 00:29 UTCEG score recompute
  16. 2026-09-17 00:43 UTCEG score recompute
  17. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  18. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  19. 2026-09-16 01:08 UTCEG score recompute
  20. 2026-09-13 23:57 UTCEG score recompute
  21. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-09-13 00:23 UTCEG score recompute
  23. 2026-09-12 00:48 UTCEG score recompute
  24. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  25. 2026-09-11 01:12 UTCEG score recompute
  26. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  27. 2026-09-10 01:37 UTCEG score recompute
  28. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-09-08 20:56 UTCEG score recompute
  30. 2026-09-07 23:27 UTCEG score recompute
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  32. 2026-09-06 23:47 UTCEG score recompute
  33. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  34. 2026-09-06 00:11 UTCEG score recompute
  35. 2026-09-05 00:33 UTCEG score recompute
  36. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  37. 2026-09-02 23:11 UTCEG score recompute
  38. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  39. 2026-09-01 21:46 UTCEG score recompute
  40. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  41. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  42. 2026-08-31 21:34 UTCEG score recompute
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  44. 2026-08-30 14:44 UTCEG score recompute
  45. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  46. 2026-08-29 15:09 UTCEG score recompute
  47. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  48. 2026-08-28 11:41 UTCEG score recompute
  49. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  50. 2026-08-27 12:06 UTCEG score recompute
  51. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  52. 2026-08-26 12:31 UTCEG score recompute
  53. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  54. 2026-08-25 12:54 UTCEG score recompute
  55. 2026-08-24 13:18 UTCEG score recompute
  56. 2026-08-23 13:44 UTCEG score recompute
  57. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  58. 2026-08-22 14:09 UTCEG score recompute
  59. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  60. 2026-08-21 14:30 UTCEG score recompute
  61. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  62. 2026-08-20 14:55 UTCEG score recompute
  63. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  64. 2026-08-18 15:36 UTCEG score recompute
  65. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  66. 2026-08-17 15:52 UTCEG score recompute
  67. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  68. 2026-08-16 16:17 UTCEG score recompute
  69. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  70. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  71. 2026-08-15 16:43 UTCEG score recompute
  72. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  73. 2026-08-14 13:14 UTCEG score recompute
  74. 2026-08-13 16:26 UTCEG score recompute
  75. 2026-08-13 16:00 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-53794?
CVE-2026-53794 is a medium-severity vulnerability; its CVE record was published on August 13, 2026. rsync before 3.5.0 contains a logic error in --max-alloc handling that allows a sender or configuration setting --max-alloc=0 to disable allocation sanity checks entirely rather than enforcing a zero-byte cap. Attackers can exploit this flaw to cause the receiver to attempt unbounded memory…
When was CVE-2026-53794 made public?
CVE-2026-53794 was made public on August 12, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 13, 2026. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-53794 actively exploited?
CVE-2026-53794 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53794?
CVE-2026-53794 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53794?
A fix for CVE-2026-53794 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53794 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-53794

Explore →

Is Your Infrastructure Affected by CVE-2026-53794?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs