CVE-2026-70453

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 57% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

August 13, 2026

Last Modified

September 8, 2026

Advisory Details (3)

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

rsync < 3.5.0 Algorithmic Complexity DoS via hash_search() | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rsync-algorithmic-complexity-dos-via-hash-search
github_release Patch Available

v3.5.0

Patch available: RsyncProject/rsync v3.5.0

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

rsync: Quadratic CPU exhaustion in hash_search() from a crafted equal-weak-checksum chain · Advisory · RsyncProject/rsync · GitHub

https://github.com/RsyncProject/rsync/security/advisories/GHSA-8x5r-mjx8-83hv

Vendor Advisories for CVE-2026-70453(1)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrsync-0:3.5.0-3.el10_22026-09-14redhat
redhatrsync-0:3.2.7-1.el9_82026-09-14redhat

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

(7 across 7 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
rsync—3.5.0-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
rsync—3.5.0-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
rsync—3.5.0-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
rsync—3.5.0-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
rsync3.2.7-1 ... 3.5.0+ds1-2 (30 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
rsync3.4.1+ds1-5 ... 3.5.0+ds1-2 (15 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
rsync3.4.1+ds1-5 ... 3.4.4+ds1-1 (9 versions)3.5.0+ds1-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2026-70453?
CVE-2026-70453 is a high vulnerability published on August 13, 2026. rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust…
When was CVE-2026-70453 disclosed?
CVE-2026-70453 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70453 actively exploited?
CVE-2026-70453 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.6% of all scored CVEs.
What is the CVSS score of CVE-2026-70453?
CVE-2026-70453 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-70453?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70453, 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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