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CVE-2026-77587

HIGH
7.5
CVSS Score
Published: August 20, 2026 at 08:47 PM UTC
Updated: October 18, 2026 at 08:10 PM UTC
1 product affected across 1 vendorTor

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Tor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been closed. A malicious exit node could use this to crash a client. This is TROVE-2026-026.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tor· Torproject
95%
All versionsv < 0.4.9.110.4.8.1-alpha
Affected range stops below 0.4.9.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Permissions RequiredRelease NotesVendor Advisory
Source: cverecord
https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.11/ChangeLog

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-911CWE-416

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