CVE-2026-5090

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

A fix is available — apply it.

Template::Plugin::HTML versions through 3.102 for Perl allows HTML and JavaScript to be injected.

The html_filter function did not escape single quotes. HTML attributes inside of single quotes could be have code injected. For example, the variable "var" in

would not be properly escaped. An attacker could insert some limited HTML and JavaScript, for example,

var = " ' onclick='while (true) { alert(1) }'"

Note that arbitrary HTML and JavaScript would be difficult to inject, because angle brackets, ampersands and double-quotes would still be escaped.

CVSS v3
6.1
EG Score
6.1(medium)
EPSS
20.2%
KEV
Not listed

Published

May 19, 2026

Last Modified

May 20, 2026

Advisory Details (3)

Auto-updated Jun 15, 2026
⚠️ Active exploitation confirmed. Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic

oss-security - CVE-2026-5090: Template::Plugin::HTML versions through 3.102 for Perl allows HTML and JavaScript to be injected

http://www.openwall.com/lists/oss-security/2026/05/19/40
github_pr

fix: escape single quotes in HTML filter

Fix merged in abw/Template2 PR #337 on 2026-03-22 — awaiting tagged release

https://github.com/abw/Template2/pull/337/changes/11c78a7a771d4af505efeb754a0b8775689c2eae
generic🔴 Active Exploitation

html filter should escape single-quotes, too · Issue #327 · cpan-authors/Template2 · GitHub

https://github.com/abw/Template2/issues/327

Vendor Advisories for CVE-2026-5090(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibtemplate-perl (2.27-1ubuntu0.25.10.1) @ questing2026-06-29ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 64× 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 135 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-5090?
CVE-2026-5090 is a medium vulnerability published on May 19, 2026. Template::Plugin::HTML versions through 3.102 for Perl allows HTML and JavaScript to be injected. The html_filter function did not escape single quotes. HTML attributes inside of single quotes could be have code injected. For example, the variable "var" in <a id='ref' title='[% var | html %]'>…
When was CVE-2026-5090 disclosed?
CVE-2026-5090 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5090 actively exploited?
CVE-2026-5090 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5090?
CVE-2026-5090 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-5090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5090, 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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