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% (42nd percentile of EPSS-scored CVEs). 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 — 3 sources updated 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: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
42nd
KEV
Not listed

CISA SSVCTrack 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). 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

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
githubMentions a patch (unverified)

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(3)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrsync-0:3.1.3-28.el8_102026-09-30redhat
redhatrhcos-4.22.9.8.202609221802-02026-09-29redhat
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 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.

Additional Vendor Advisories

(3)

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 16× in last 7d / 78× 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.

Showing the most recent 100 of 136 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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 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 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70453?
CVE-2026-70453 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70453?
A fix for CVE-2026-70453 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70453 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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