CVE-2026-8594

MEDIUMNVD 6.26.2—
EchelonGraph scoreMEDIUM confidence

Score 6.2 from GitHub Security Advisory published 2026-05-30. NVD baseline CVSS 6.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters.

Text::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment.

A side effect of this is that the full input can be duplicated for each segment. Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service.

Note that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module.

CVSS v3
6.2
EG Score
6.2(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: Track

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
Severity62% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

May 30, 2026

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jun 16, 2026
No patch confirmed yet. Sources: github_pr.
generic

oss-security - CVE-2026-8594: Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters

http://www.openwall.com/lists/oss-security/2026/05/30/6
generic
https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch
generic

Client Challenge

https://metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/LineFold.pm#L407-415
github_pr

Fix CVE-2026-8594

Upstream fix in progress (PR #6 · hatukanezumi/Unicode-LineBreak, state=open)

https://github.com/hatukanezumi/Unicode-LineBreak/pull/6

Vendor Advisories for CVE-2026-8594(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libunicode-linebreak-perl0.0.20190101-1, 0.0.20190101-2, 0.0.20190101-3, 0.0.20190101-4——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libunicode-linebreak-perl0.0.20190101-1, 0.0.20190101-2, 0.0.20190101-3, 0.0.20190101-4——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libunicode-linebreak-perl0.0.20190101-1, 0.0.20190101-2, 0.0.20190101-3, 0.0.20190101-4——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libunicode-linebreak-perl0.0.20190101-1, 0.0.20190101-2, 0.0.20190101-30.0.20190101-4—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 35× 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 194 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-8594?
CVE-2026-8594 is a medium vulnerability published on May 30, 2026. Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters. Text::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just…
When was CVE-2026-8594 disclosed?
CVE-2026-8594 was first published in the National Vulnerability Database on May 30, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8594 actively exploited?
CVE-2026-8594 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.2% of all scored CVEs.
What is the CVSS score of CVE-2026-8594?
CVE-2026-8594 has a CVSS v3 base score of 6.2 (NVD).
How do I remediate CVE-2026-8594?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8594, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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