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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 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)
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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

May 19, 2026

Last Modified

July 24, 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 (3.102-1ubuntu0.1) @ resolute2026-08-23ubuntu

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libtemplate-perl2.27-1, 3.102-1, 3.102-2, 3.102-3, 3.106-1——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libtemplate-perl2.27-1, 3.102-1, 3.102-2, 3.102-3, 3.106-1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libtemplate-perl2.27-1, 3.102-1, 3.102-2, 3.102-3, 3.106-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libtemplate-perl2.27-1, 3.102-1, 3.102-23.102-3—

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 6× in last 7d / 59× 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 220 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 19:17 UTCEPSS rescore
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-23 16:59 UTCEG score recompute
  11. 2026-08-23 16:59 UTCVendor advisory
  12. 2026-08-23 16:59 UTCGHSA enrichment
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 23:35 UTCEG score recompute
  16. 2026-08-21 23:35 UTCVendor advisory
  17. 2026-08-21 23:35 UTCGHSA enrichment
  18. 2026-08-20 22:55 UTCEPSS rescore
  19. 2026-08-20 18:58 UTCEG score recompute
  20. 2026-08-20 18:58 UTCVendor advisory
  21. 2026-08-20 18:58 UTCGHSA enrichment
  22. 2026-08-19 17:04 UTCEPSS rescore
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-17 09:57 UTCEG score recompute
Show 75 more
  1. 2026-08-17 09:57 UTCVendor advisory
  2. 2026-08-17 09:57 UTCGHSA enrichment
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 03:32 UTCEG score recompute
  5. 2026-08-16 03:32 UTCVendor advisory
  6. 2026-08-16 03:32 UTCGHSA enrichment
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 02:05 UTCEG score recompute
  9. 2026-08-14 02:05 UTCVendor advisory
  10. 2026-08-14 02:05 UTCGHSA enrichment
  11. 2026-08-13 22:00 UTCEPSS rescore
  12. 2026-08-12 13:51 UTCEPSS rescore
  13. 2026-08-12 11:59 UTCEG score recompute
  14. 2026-08-12 11:59 UTCVendor advisory
  15. 2026-08-12 11:59 UTCGHSA enrichment
  16. 2026-08-11 07:54 UTCEG score recompute
  17. 2026-08-11 07:54 UTCVendor advisory
  18. 2026-08-11 07:54 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 06:12 UTCEG score recompute
  21. 2026-08-10 06:12 UTCVendor advisory
  22. 2026-08-10 06:12 UTCGHSA enrichment
  23. 2026-08-09 13:46 UTCEPSS rescore
  24. 2026-08-09 04:29 UTCEG score recompute
  25. 2026-08-09 04:29 UTCVendor advisory
  26. 2026-08-09 04:29 UTCGHSA enrichment
  27. 2026-08-08 16:37 UTCEPSS rescore
  28. 2026-08-08 02:47 UTCEG score recompute
  29. 2026-08-08 02:47 UTCVendor advisory
  30. 2026-08-08 02:47 UTCGHSA enrichment
  31. 2026-08-07 01:05 UTCEG score recompute
  32. 2026-08-07 01:05 UTCVendor advisory
  33. 2026-08-07 01:05 UTCGHSA enrichment
  34. 2026-08-06 13:47 UTCEPSS rescore
  35. 2026-08-05 21:20 UTCEG score recompute
  36. 2026-08-05 21:20 UTCVendor advisory
  37. 2026-08-05 21:20 UTCGHSA enrichment
  38. 2026-08-05 19:17 UTCEPSS rescore
  39. 2026-08-04 15:10 UTCEPSS rescore
  40. 2026-08-04 10:39 UTCEPSS rescore
  41. 2026-08-03 21:15 UTCEG score recompute
  42. 2026-08-03 21:15 UTCVendor advisory
  43. 2026-08-03 21:15 UTCGHSA enrichment
  44. 2026-08-03 10:36 UTCEPSS rescore
  45. 2026-08-02 19:33 UTCEG score recompute
  46. 2026-08-02 19:33 UTCVendor advisory
  47. 2026-08-02 19:33 UTCGHSA enrichment
  48. 2026-08-02 02:27 UTCEPSS rescore
  49. 2026-08-01 17:50 UTCEG score recompute
  50. 2026-08-01 17:50 UTCVendor advisory
  51. 2026-08-01 17:50 UTCGHSA enrichment
  52. 2026-08-01 04:16 UTCEPSS rescore
  53. 2026-07-30 16:28 UTCEPSS rescore
  54. 2026-07-30 01:30 UTCEPSS rescore
  55. 2026-07-30 01:30 UTCEPSS rescore
  56. 2026-07-28 15:37 UTCEPSS rescore
  57. 2026-07-27 14:14 UTCEPSS rescore
  58. 2026-07-26 14:54 UTCEPSS rescore
  59. 2026-07-26 14:54 UTCEPSS rescore
  60. 2026-07-26 08:18 UTCEG score recompute
  61. 2026-07-26 08:18 UTCVendor advisory
  62. 2026-07-26 08:17 UTCGHSA enrichment
  63. 2026-07-25 14:18 UTCEPSS rescore
  64. 2026-07-25 14:18 UTCEPSS rescore
  65. 2026-07-24 14:18 UTCEPSS rescore
  66. 2026-07-24 14:18 UTCEPSS rescore
  67. 2026-07-23 14:18 UTCEPSS rescore
  68. 2026-07-23 14:18 UTCEPSS rescore
  69. 2026-07-23 03:19 UTCEG score recompute
  70. 2026-07-22 14:08 UTCEPSS rescore
  71. 2026-07-22 14:08 UTCEPSS rescore
  72. 2026-07-21 15:25 UTCEPSS rescore
  73. 2026-07-21 15:25 UTCEPSS rescore
  74. 2026-07-20 17:08 UTCEPSS rescore
  75. 2026-07-19 14:31 UTCEPSS rescore

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 July 24, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 79.6% of all scored CVEs.
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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