CVE-2026-43618

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.1Exploit: NoneExposed: 0

A fix is available — apply it.

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.

CVSS v3
8.1
EG Score
8.1(medium)
EPSS
51.5%
KEV
Not listed

Published

May 20, 2026

Last Modified

June 30, 2026

Advisory Details (3)

Auto-updated May 20, 2026
Patch available. Sources: github.
generic

Rsync < 3.4.3 Integer Overflow Information Disclosure | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rsync-integer-overflow-information-disclosure
github Patch Available

rsync: Integer overflow in compressed-token decoding enables remote memory dump · Advisory · RsyncProject/rsync · GitHub

Affected: 3.4.3

https://github.com/RsyncProject/rsync/security/advisories/GHSA-g37v-g3gj-pmwq
generic

Release v3.4.3 · RsyncProject/rsync · GitHub

https://github.com/RsyncProject/rsync/releases/tag/v3.4.3

Vendor Advisories for CVE-2026-43618(6)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntursync (3.4.1+ds1-7ubuntu0.2) @ resolute2026-06-29ubuntu
ubuntursync (3.1.1-3ubuntu1.3+esm5) @ xenial2026-06-29ubuntu
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatrsync-0:3.4.4-1.el10_22026-06-16redhat
redhatrsync-0:3.1.3-27.el8_102026-06-16redhat
redhatrsync-0:3.2.5-7.el9_8.22026-06-16redhat

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.

Weakness Classification(2)

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

Additional Vendor Advisories

(2)

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 6× in last 7d / 120× 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 182 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-43618?
CVE-2026-43618 is a high vulnerability published on May 20, 2026. Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended…
When was CVE-2026-43618 disclosed?
CVE-2026-43618 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43618 actively exploited?
CVE-2026-43618 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43618?
CVE-2026-43618 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-43618?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43618, 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.

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