Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-43618— Rsync < 3.4.3 Integer Overflow Information Disclosure

Quick assessment

Affected
RsyncProject rsync
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rsync是RsyncProject开源的一款快速且用途广泛的文件复制工具。用于远程文件和本地文件。 Rsync 3.4.2及之前版本存在缓冲区错误漏洞，该漏洞源于压缩令牌解码器中32位有符号计数器未检查溢出，可能导致接收进程读取并返回缓冲区外数据，泄露进程内存内容。

CVSS 8.1 · High EPSS 0.80% · P55

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories

Affected Version Matrix 1

VendorProduct Version RangeStatus
RsyncProject rsync < 3.4.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-43618

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Rsync < 3.4.3 Integer Overflow Information Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Rsync 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rsync是RsyncProject开源的一款快速且用途广泛的文件复制工具。用于远程文件和本地文件。 Rsync 3.4.2及之前版本存在缓冲区错误漏洞，该漏洞源于压缩令牌解码器中32位有符号计数器未检查溢出，可能导致接收进程读取并返回缓冲区外数据，泄露进程内存内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
RsyncProject rsync 0 ~ 3.4.3 -

II. Public POCs for CVE-2026-43618

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10048 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-43618

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-43618 (2)

Vendor Pages for CVE-2026-43618 (1)

Same Patch Batch · RsyncProject · 2026-05-20 · 6 CVEs total

CVE-2026-29518 7.0 HIGH Rsync < 3.4.3 TOCTOU Race Condition Allows Symlink-Based Arbitrary File Write
CVE-2026-43620 6.5 MEDIUM Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files()
CVE-2026-43619 6.3 MEDIUM Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
CVE-2026-43617 4.8 MEDIUM Rsync < 3.4.3 Authorization Bypass via Hostname Resolution
CVE-2026-45232 3.1 LOW Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy

IV. Related Vulnerabilities

Same product: rsync
Same vendor: RsyncProject
Same weakness: CWE-190

V. Comments for CVE-2026-43618

No comments yet

Leave a comment