CVE-2026-82387

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-28. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.4Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows a user with media-upload rights to store active content on Roller's origin, because the media upload feature trusts the upload-supplied content type and serves the stored file back with that type. A victim who opens the uploaded file executes the stored script. Media uploads are disabled by default; only installations that enable them are affected, and the shipped type restrictions do not block active content once uploads are on. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which derives the stored type from file content and serves non-image media as a download.

CVSS v3
5.4
EG Score
5.4MEDIUMhigh confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 28, 2026

Last Modified

September 29, 2026

Advisory Details (2)

Auto-updated Sep 28, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic
https://lists.apache.org/thread/9h1d77xjjk6q90k7l8y7nyffg6ltdzxo
github_pr

Derive media content types from file content, not the request

Fix merged in apache/roller PR #174 on 2026-09-05 — awaiting tagged release

https://github.com/apache/roller/pull/174

Vendor Advisories for CVE-2026-82387(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 27× 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.

  1. 2026-10-04 12:31 UTCEG score recompute
  2. 2026-10-04 12:31 UTCGHSA enrichment
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-03 13:07 UTCEG score recompute
  5. 2026-10-03 13:07 UTCGHSA enrichment
  6. 2026-10-02 17:57 UTCEPSS rescore
  7. 2026-10-02 13:43 UTCEG score recompute
  8. 2026-10-02 13:42 UTCGHSA enrichment
  9. 2026-10-01 19:50 UTCEPSS rescore
  10. 2026-10-01 14:13 UTCEG score recompute
  11. 2026-10-01 14:13 UTCGHSA enrichment
  12. 2026-09-30 15:04 UTCEPSS rescore
  13. 2026-09-30 14:50 UTCGHSA enrichment
  14. 2026-09-29 15:25 UTCEG score recompute
  15. 2026-09-29 15:25 UTCGHSA enrichment
  16. 2026-09-29 15:09 UTCEG score recompute
  17. 2026-09-29 15:09 UTCGHSA enrichment
  18. 2026-09-29 13:54 UTCEG score recompute
  19. 2026-09-29 13:54 UTCGHSA enrichment
  20. 2026-09-28 14:30 UTCEG score recompute
  21. 2026-09-28 14:30 UTCGHSA enrichment
  22. 2026-09-28 13:52 UTCEPSS rescore
  23. 2026-09-28 09:32 UTCEG score recompute
  24. 2026-09-28 09:32 UTCGHSA enrichment
  25. 2026-09-28 08:29 UTCEG score recompute
Show 2 more
  1. 2026-09-28 07:47 UTCEG score recompute
  2. 2026-09-28 07:47 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82387?
CVE-2026-82387 is a medium vulnerability published on September 28, 2026. Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows a user with media-upload rights to store active content on Roller's origin, because the media upload feature trusts the upload-supplied content type and serves the stored file back…
When was CVE-2026-82387 disclosed?
CVE-2026-82387 was first published on September 28, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82387 actively exploited?
CVE-2026-82387 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82387?
CVE-2026-82387 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82387?
An upstream fix for CVE-2026-82387 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-82387 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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