CVE-2026-14191

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-01. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

Published

July 1, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 1, 2026
Patch available.
generic

WinRAR archiver, a powerful tool to process RAR and ZIP files

https://www.rarlab.com/download.htm

Vendor Advisories for CVE-2026-14191(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(6 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
rar1:3.5.1-1 ... 3.30-2 (52 versions)
  • every version on: no fix on record
—
unrar-nonfree1:3.5.2-0.1 ... 3.4.3-1 (118 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
rar1:3.5.1-1 ... 3.30-2 (52 versions)
  • every version on: no fix on record
—
unrar-nonfree1:3.5.2-0.1 ... 3.4.3-1 (117 versions)
  • every version on: no fix on record
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
rar1:3.5.1-1 ... 3.30-2 (51 versions)
  • every version up to 2:7.23-1: fixed in 2:7.23-1
—
unrar-nonfree1:3.5.2-0.1 ... 3.4.3-1 (114 versions)
  • every version up to 1:7.2.7-1: fixed in 1:7.2.7-1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 225 total refreshes for this CVE.

  1. 2026-10-10 19:59 UTCEPSS rescore
  2. 2026-10-09 20:06 UTCEPSS rescore
  3. 2026-10-08 17:11 UTCEPSS rescore
  4. 2026-10-07 23:47 UTCEPSS rescore
  5. 2026-10-06 15:17 UTCEPSS rescore
  6. 2026-10-05 17:42 UTCEPSS rescore
  7. 2026-10-04 23:21 UTCEPSS rescore
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-09-30 15:02 UTCEPSS rescore
  11. 2026-09-29 15:20 UTCEPSS rescore
  12. 2026-09-28 13:51 UTCEPSS rescore
  13. 2026-09-27 13:47 UTCEPSS rescore
  14. 2026-09-26 15:58 UTCEPSS rescore
  15. 2026-09-23 06:58 UTCEG score recompute
  16. 2026-09-23 06:58 UTCGHSA enrichment
  17. 2026-09-18 19:27 UTCEPSS rescore
  18. 2026-09-18 06:38 UTCEG score recompute
  19. 2026-09-18 06:38 UTCGHSA enrichment
  20. 2026-09-16 14:07 UTCEPSS rescore
  21. 2026-09-16 05:14 UTCEPSS rescore
  22. 2026-09-14 00:28 UTCEG score recompute
  23. 2026-09-14 00:28 UTCGHSA enrichment
  24. 2026-09-13 16:46 UTCEPSS rescore
  25. 2026-09-13 09:10 UTCEG score recompute
Show 75 more
  1. 2026-09-13 09:10 UTCGHSA enrichment
  2. 2026-09-12 15:00 UTCEPSS rescore
  3. 2026-09-12 14:52 UTCEG score recompute
  4. 2026-09-12 14:52 UTCGHSA enrichment
  5. 2026-09-11 14:52 UTCEPSS rescore
  6. 2026-09-11 09:36 UTCEPSS rescore
  7. 2026-09-10 09:34 UTCEPSS rescore
  8. 2026-09-08 22:00 UTCEPSS rescore
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-06 04:57 UTCEG score recompute
  12. 2026-09-06 04:57 UTCGHSA enrichment
  13. 2026-09-04 05:06 UTCEPSS rescore
  14. 2026-09-02 14:11 UTCEPSS rescore
  15. 2026-09-01 13:53 UTCEPSS rescore
  16. 2026-09-01 04:39 UTCEPSS rescore
  17. 2026-08-31 02:28 UTCEG score recompute
  18. 2026-08-31 02:28 UTCGHSA enrichment
  19. 2026-08-30 19:17 UTCEPSS rescore
  20. 2026-08-30 13:44 UTCEG score recompute
  21. 2026-08-30 13:44 UTCGHSA enrichment
  22. 2026-08-30 01:21 UTCEPSS rescore
  23. 2026-08-28 21:40 UTCEPSS rescore
  24. 2026-08-27 22:30 UTCEG score recompute
  25. 2026-08-27 22:30 UTCGHSA enrichment
  26. 2026-08-27 14:24 UTCEPSS rescore
  27. 2026-08-25 13:48 UTCEPSS rescore
  28. 2026-08-24 23:43 UTCEG score recompute
  29. 2026-08-24 23:43 UTCGHSA enrichment
  30. 2026-08-24 10:59 UTCEG score recompute
  31. 2026-08-24 10:59 UTCGHSA enrichment
  32. 2026-08-23 22:03 UTCGHSA enrichment
  33. 2026-08-23 09:17 UTCEG score recompute
  34. 2026-08-23 09:17 UTCGHSA enrichment
  35. 2026-08-23 00:19 UTCEPSS rescore
  36. 2026-08-22 20:34 UTCGHSA enrichment
  37. 2026-08-22 07:50 UTCEG score recompute
  38. 2026-08-22 07:50 UTCGHSA enrichment
  39. 2026-08-21 23:48 UTCEPSS rescore
  40. 2026-08-21 19:06 UTCGHSA enrichment
  41. 2026-08-21 06:21 UTCEG score recompute
  42. 2026-08-21 06:21 UTCGHSA enrichment
  43. 2026-08-20 22:55 UTCEPSS rescore
  44. 2026-08-20 17:36 UTCGHSA enrichment
  45. 2026-08-20 04:52 UTCEG score recompute
  46. 2026-08-20 04:52 UTCGHSA enrichment
  47. 2026-08-19 17:03 UTCEPSS rescore
  48. 2026-08-19 10:19 UTCGHSA enrichment
  49. 2026-08-18 21:02 UTCEG score recompute
  50. 2026-08-18 21:02 UTCGHSA enrichment
  51. 2026-08-18 13:48 UTCEPSS rescore
  52. 2026-08-18 06:20 UTCGHSA enrichment
  53. 2026-08-17 16:51 UTCEG score recompute
  54. 2026-08-17 16:51 UTCGHSA enrichment
  55. 2026-08-17 03:53 UTCGHSA enrichment
  56. 2026-08-16 15:09 UTCEG score recompute
  57. 2026-08-16 15:09 UTCGHSA enrichment
  58. 2026-08-16 14:56 UTCEPSS rescore
  59. 2026-08-16 02:26 UTCEG score recompute
  60. 2026-08-16 02:26 UTCGHSA enrichment
  61. 2026-08-16 02:14 UTCEPSS rescore
  62. 2026-08-15 13:43 UTCEG score recompute
  63. 2026-08-15 13:43 UTCGHSA enrichment
  64. 2026-08-15 01:30 UTCEPSS rescore
  65. 2026-08-15 00:49 UTCGHSA enrichment
  66. 2026-08-14 12:05 UTCGHSA enrichment
  67. 2026-08-13 23:22 UTCEG score recompute
  68. 2026-08-13 23:22 UTCGHSA enrichment
  69. 2026-08-13 22:00 UTCEPSS rescore
  70. 2026-08-13 10:39 UTCGHSA enrichment
  71. 2026-08-12 21:55 UTCEG score recompute
  72. 2026-08-12 21:55 UTCGHSA enrichment
  73. 2026-08-12 13:50 UTCEPSS rescore
  74. 2026-08-12 09:12 UTCGHSA enrichment
  75. 2026-08-11 20:28 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-14191?
CVE-2026-14191 is a high vulnerability published on July 1, 2026. 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…
When was CVE-2026-14191 disclosed?
CVE-2026-14191 was first published on July 1, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-14191 actively exploited?
CVE-2026-14191 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-14191?
CVE-2026-14191 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-14191?
A fix for CVE-2026-14191 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-14191 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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