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CVE-2026-70454: rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate

35
Routine
HIGH 8.0WATCHLIST

CVE-2026-70454 is a high-severity flaw (CVSS 8.0) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate validation vulnerability that allows on-path attackers to intercept encrypted sessions by presenting self-signed or otherwise invalid certificates. Attackers can exploit the failure to validate server TLS certificates against a trusted CA or verify certificate hostname matching to decrypt or tamper with rsync session content without detec

Why this priority

  • High severity
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score8.0 (High)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionRequired
EPSS exploit chance0.2% (top 92%)
CISA exploited listNo
WeaknessCWE-295
Published2026-08-13
Last modified2026-10-23
Publisher (CNA): VulnCheck

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

Exact fixes by distribution

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source
sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2
Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source
sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0
Debian 12 · rsync · NO FIX YET
Debian 13 · rsync · FIXED · 3.5.0+ds1-0+deb13u1
sudo apt update && sudo apt install --only-upgrade rsync dpkg --compare-versions "$(dpkg-query -W -f='${Version}' rsync)" ge "3.5.0+ds1-0+deb13u1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 10 · rsync · FIXED · rsync-3.5.0-3.el10_2
sudo dnf upgrade --advisory=RHSA-2026:67463 rpm -q rsync
RHEL 9 · rsync · FIXED · rsync-3.2.7-1.el9_8
sudo dnf upgrade --advisory=RHSA-2026:67462 rpm -q rsync
RHEL 6 · rsync · NOT AFFECTED
RHEL 7 · rsync · NOT AFFECTED
RHEL 8 · rsync · NOT AFFECTED
Alpine 3.21 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync apk info -v rsync
Alpine 3.22 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync apk info -v rsync
Alpine 3.23 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync apk info -v rsync
Alpine 3.24 · rsync · FIXED · rsync-3.5.0-r0
apk add --upgrade rsync apk info -v rsync
Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-3131 · source
sudo dnf update --advisory=ALAS2023-2026-3131
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-70454?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-70454 being exploited?

CVE-2026-70454 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70454 affect?

CVE-2026-70454 affects affected software. Severity is high (CVSS 8.0). rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate validation vulnerability that allows on-path attackers to intercept encrypted sessions by presenting self-signed or otherwise inva

How urgent is CVE-2026-70454?

Priority 35/100. High severity; On your watchlist

Software pages

OpenSSL vulnerabilities

References

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