How severe is CVE-2026-45232?

CVE-2026-45232 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-45232 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45232?

CVE-2026-45232 affects Samba Rsync. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45232?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45232 have an EU (EUVD) identifier?

Yes. CVE-2026-45232 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31009.

When was CVE-2026-45232 published?

CVE-2026-45232 was published on 2026-05-20 and last updated on 2026-06-17.

CVE-2026-45232

CVE-2026-45232 is a low-severity vulnerability in Samba Rsync with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-193.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
CVSS v4: 2.1
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31009
Weakness: CWE-193
Affected product: Samba Rsync
Published: 2026-05-20
Last modified: 2026-06-17

Description

Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.

Frequently asked questions

What is CVE-2026-45232?: Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.
How severe is CVE-2026-45232?: CVE-2026-45232 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-45232 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45232?: CVE-2026-45232 affects Samba Rsync. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45232?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45232 have an EU (EUVD) identifier?: Yes. CVE-2026-45232 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31009.
When was CVE-2026-45232 published?: CVE-2026-45232 was published on 2026-05-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*

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