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TI-2026-12022 Aliases CVE-2026-14191GHSA-5hjj-fvq6-8j36

WinRAR / UnRAR RAR5 recovery-volume (.rev) out-of-bounds heap write in RecVolumes5::ReadHeader

Priority LOW 36CWE-129Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-129 and the CVSS impact.

Summary

An out-of-bounds heap write exists in the RAR5 recovery-volume (.rev) parser in WinRAR and UnRAR (RecVolumes5::ReadHeader in recvol5.cpp). The RecItems vector is sized only when the first .rev file in a set is processed; subsequent .rev files supply an independent RecNum value that is validated against that file's own TotalCount field but never against the actual size of RecItems. A crafted set of two or more .rev files can therefore write an attacker-controlled 32-bit value (the header's RevCRC field) to RecItems[RecNum] at an attacker-controlled offset up to 65534 * sizeof(RecVolItem) bytes past the allocation, corrupting adjacent heap objects. Triggering requires the victim to run a recovery/test operation on an attacker-supplied .rev set (for example 'unrar t x.part1.rev', WinRAR 'Repair archive', or auto-recovery when extracting a volume set with a missing .rar part). This is the RAR5-path sibling of CVE-2023-40477 (which was fixed in the RAR3 path only in WinRAR 6.23). Fixed in WinRAR / RAR 7.23.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00437 38th percentileScored 2026-11-07
Fix Fixed WinRAR (RARLAB): 7.23RAR (RARLAB): 7.23+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RARLABWinRARbefore 7.237.23Patch availableCNA
RARLABRARbefore 7.237.23Patch availableCNA
RARLABUnRARup to 7.21—No fix listedCNA
RARLABUnRAR.dllbefore 7.237.23Patch availableCNA
  • WinRAR VendorRARLAB Affected before 7.23 Fixed in 7.23 Patch available CNA
  • RAR VendorRARLAB Affected before 7.23 Fixed in 7.23 Patch available CNA
  • UnRAR VendorRARLAB Affected up to 7.21 Fixed in — No fix listed CNA
  • UnRAR.dll VendorRARLAB Affected before 7.23 Fixed in 7.23 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:rarlab:winrar:*:*:*:*:*:*:*:*——RARLAB
  • cpe:2.3:a:rarlab:winrar:*:*:*:*:*:*:*:* Versions — — ·RARLAB

Remediation

  • Fix · CNA WinRAR (RARLAB) Fixed in 7.23
  • Fix · CNA RAR (RARLAB) Fixed in 7.23
  • Fix · CNA UnRAR.dll (RARLAB) Fixed in 7.23

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-14191
  2. 2026-10-03 Alias added: GHSA-5hjj-fvq6-8j36

References

Patch 1

Other 2

  • TI-2022-12568 RARLAB UnRAR before 6.12 on Linux and UNIX allows directory traversal to write to files… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-07400 Path traversal vulnerability in WinRAR KEVCVSS 4.0HIGH 8.4
  • TI-2025-05626 Path traversal in RARLAB WinRAR KEVCVSS 3.0HIGH 7.8
  • TI-2023-20115 RARLAB WinRAR before 6.23 allows attackers to execute arbitrary code when a user attempts… KEVCVSS 3.1HIGH 7.8
  • TI-2018-14356 Path traversal in Check Point Software Technologies Ltd. WinRAR KEVCVSS 3.1HIGH 7.8
  • TI-2024-23905 RARLAB WinRAR before 7.00, on Windows, allows attackers to spoof the screen output via… CVSS 3.1HIGH 7.5
See all 46 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences