CVE-2026-44603

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Summary

CVECVE-2026-44603
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-07 04:16:35 UTC
Updated2026-05-07 17:24:36 UTC
DescriptionTor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.000440000 probability, percentile 0.133710000 (date 2026-05-11)

Problem Types: CWE-193 | CWE-193 CWE-193 Off-by-one Error

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNACVSS3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Torproject Tor All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Torproject Tor affected 0.4.9.7 custom Not specified

References

ReferenceSourceLinkTags
gitlab.torproject.org/tpo/core/tor/-/work_items/41245 [email protected] gitlab.torproject.org Broken Link
www.openwall.com/lists/oss-security/2026/05/06/8 [email protected] www.openwall.com Mailing List, Third Party Advisory
gitlab.torproject.org/tpo/core/tor/-/commit/1703df3d439c83c2184e259fad1cfa19240f9c89 [email protected] gitlab.torproject.org Patch
forum.torproject.org/c/news/tor-release-announcement/28 [email protected] forum.torproject.org Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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