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
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 6× in last 7d / 58× 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 179 total refreshes for this CVE.

  1. 2026-09-04 05:07 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 04:40 UTCEPSS rescore
  5. 2026-08-30 19:18 UTCEPSS rescore
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 14:47 UTCEPSS rescore
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-25 04:07 UTCEG score recompute
  12. 2026-08-25 04:07 UTCGHSA enrichment
  13. 2026-08-24 14:18 UTCEPSS rescore
  14. 2026-08-23 14:02 UTCEG score recompute
  15. 2026-08-23 14:02 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-21 23:49 UTCEPSS rescore
  18. 2026-08-21 14:56 UTCEG score recompute
  19. 2026-08-21 14:56 UTCGHSA enrichment
  20. 2026-08-20 22:56 UTCEPSS rescore
  21. 2026-08-20 10:23 UTCEG score recompute
  22. 2026-08-20 10:23 UTCGHSA enrichment
  23. 2026-08-19 17:04 UTCEPSS rescore
  24. 2026-08-18 13:49 UTCEPSS rescore
  25. 2026-08-18 13:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-17 13:47 UTCEPSS rescore
  2. 2026-08-17 06:49 UTCEG score recompute
  3. 2026-08-17 06:49 UTCGHSA enrichment
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 14:56 UTCEPSS rescore
  6. 2026-08-16 02:15 UTCEPSS rescore
  7. 2026-08-15 16:41 UTCEG score recompute
  8. 2026-08-15 16:41 UTCGHSA enrichment
  9. 2026-08-15 01:31 UTCEPSS rescore
  10. 2026-08-14 05:31 UTCEG score recompute
  11. 2026-08-14 05:31 UTCGHSA enrichment
  12. 2026-08-13 22:00 UTCEPSS rescore
  13. 2026-08-13 04:49 UTCEG score recompute
  14. 2026-08-13 04:49 UTCGHSA enrichment
  15. 2026-08-12 13:51 UTCEPSS rescore
  16. 2026-08-12 04:06 UTCEG score recompute
  17. 2026-08-12 04:06 UTCGHSA enrichment
  18. 2026-08-11 13:43 UTCEPSS rescore
  19. 2026-08-11 03:15 UTCEG score recompute
  20. 2026-08-11 03:15 UTCGHSA enrichment
  21. 2026-08-11 00:00 UTCEPSS rescore
  22. 2026-08-10 02:32 UTCEG score recompute
  23. 2026-08-10 02:32 UTCGHSA enrichment
  24. 2026-08-09 13:47 UTCEPSS rescore
  25. 2026-08-09 01:50 UTCEG score recompute
  26. 2026-08-09 01:50 UTCGHSA enrichment
  27. 2026-08-08 16:37 UTCEPSS rescore
  28. 2026-08-08 01:07 UTCEG score recompute
  29. 2026-08-08 01:07 UTCGHSA enrichment
  30. 2026-08-07 16:30 UTCEPSS rescore
  31. 2026-08-07 00:25 UTCEG score recompute
  32. 2026-08-07 00:25 UTCGHSA enrichment
  33. 2026-08-06 13:47 UTCEPSS rescore
  34. 2026-08-05 23:37 UTCEG score recompute
  35. 2026-08-05 23:37 UTCGHSA enrichment
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 19:17 UTCEPSS rescore
  38. 2026-08-04 22:54 UTCEG score recompute
  39. 2026-08-04 22:54 UTCGHSA enrichment
  40. 2026-08-04 15:10 UTCEPSS rescore
  41. 2026-08-04 10:39 UTCEPSS rescore
  42. 2026-08-03 15:54 UTCEG score recompute
  43. 2026-08-03 15:54 UTCGHSA enrichment
  44. 2026-08-03 10:36 UTCEPSS rescore
  45. 2026-08-02 14:34 UTCEG score recompute
  46. 2026-08-02 14:34 UTCGHSA enrichment
  47. 2026-08-02 02:27 UTCEPSS rescore
  48. 2026-08-01 13:51 UTCEG score recompute
  49. 2026-08-01 13:51 UTCGHSA enrichment
  50. 2026-08-01 04:16 UTCEPSS rescore
  51. 2026-07-31 05:50 UTCEG score recompute
  52. 2026-07-31 05:50 UTCGHSA enrichment
  53. 2026-07-30 16:28 UTCEPSS rescore
  54. 2026-07-30 01:30 UTCEPSS rescore
  55. 2026-07-29 11:27 UTCEG score recompute
  56. 2026-07-29 11:27 UTCGHSA enrichment
  57. 2026-07-28 15:37 UTCEPSS rescore
  58. 2026-07-28 03:59 UTCEG score recompute
  59. 2026-07-28 03:58 UTCGHSA enrichment
  60. 2026-07-27 14:14 UTCEPSS rescore
  61. 2026-07-27 02:57 UTCEG score recompute
  62. 2026-07-27 02:57 UTCGHSA enrichment
  63. 2026-07-26 14:54 UTCEPSS rescore
  64. 2026-07-25 14:18 UTCEPSS rescore
  65. 2026-07-24 14:18 UTCEPSS rescore
  66. 2026-07-23 14:18 UTCEPSS rescore
  67. 2026-07-23 03:23 UTCEG score recompute
  68. 2026-07-22 14:08 UTCEPSS rescore
  69. 2026-07-21 15:25 UTCEPSS rescore
  70. 2026-07-21 15:25 UTCEPSS rescore
  71. 2026-07-20 17:08 UTCEPSS rescore
  72. 2026-07-19 14:31 UTCEPSS rescore
  73. 2026-07-19 02:29 UTCEPSS rescore
  74. 2026-07-18 10:04 UTCEPSS rescore
  75. 2026-07-16 17:03 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 90.5% 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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