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CVE-2026-44599: Tor before 0.4.9.7 can attempt or accept BEGIN_DIR via conflux legs, aka TROVE-2026-008.

23
Routine
LOW 3.7REMOTEUPGRADE

CVE-2026-44599 is a low-severity flaw (CVSS 3.7) affecting tor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tor before 0.4.9.7 can attempt or accept BEGIN_DIR via conflux legs, aka TROVE-2026-008.

Why this priority

  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score3.7 (Low)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 79%)
CISA exploited listNo
WeaknessCWE-669
Published2026-05-07
Last modified2026-10-26
Publisher (CNA): MITRE · Vendor: torproject

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Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

torproject tor UPGRADE
Affected: < 0.4.9.7
Fixed in: 0.4.9.7
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tor || rpm -q tor || tor --version
2. UPGRADE to 0.4.9.7 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tor
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tor
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
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-2026-44599?

tor: upgrade to 0.4.9.7. Exact commands for each OS are on this page.

Is CVE-2026-44599 being exploited?

CVE-2026-44599 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-2026-44599 affect?

CVE-2026-44599 affects tor. Severity is low (CVSS 3.7). Tor before 0.4.9.7 can attempt or accept BEGIN_DIR via conflux legs, aka TROVE-2026-008.

How urgent is CVE-2026-44599?

Priority 23/100. Remotely exploitable, no login, no user action

References

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