CVE-2026-82384

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-28. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.8Exploit: 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.

Deserialization of Untrusted Data in Apache Roller 6.1.5 allows an unauthenticated remote attacker to cause deserialization of attacker-controlled bytes, because the XML-RPC endpoint accepts vendor extension types that are deserialized during request parsing, before authentication. The servlet is mapped unconditionally, so parsing occurs even when the global XML-RPC feature is set to disabled; no non-default configuration is required for this path. This can lead to remote code execution. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which disables the extension types and rejects requests when the XML-RPC feature is disabled.

CVSS v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
59
EG Risk 59/100CISA 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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 at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
0.8%
EPSS %ILE
53rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

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 at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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 (3)

Auto-updated Sep 29, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic

oss-security - CVE-2026-82384: Apache Roller: Unauthenticated deserialization in the XML-RPC endpoint

http://www.openwall.com/lists/oss-security/2026/09/25/17
generic
https://lists.apache.org/thread/21p1dh6x179gmcdpw84kkx9yclrdp410
github_pr

Disable vendor extension types on the XML-RPC servlet

Fix merged in apache/roller PR #171 on 2026-09-05 — awaiting tagged release

https://github.com/apache/roller/pull/171

Vendor Advisories for CVE-2026-82384(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 60× in last 7d / 60× 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 07:20 UTCGHSA enrichment
  2. 2026-10-04 03:25 UTCGHSA enrichment
  3. 2026-10-03 23:31 UTCGHSA enrichment
  4. 2026-10-03 19:37 UTCGHSA enrichment
  5. 2026-10-03 15:43 UTCEG score recompute
  6. 2026-10-03 15:42 UTCGHSA enrichment
  7. 2026-10-03 14:26 UTCEPSS rescore
  8. 2026-10-03 11:41 UTCGHSA enrichment
  9. 2026-10-03 07:26 UTCGHSA enrichment
  10. 2026-10-03 03:31 UTCGHSA enrichment
  11. 2026-10-02 23:35 UTCGHSA enrichment
  12. 2026-10-02 19:39 UTCEG score recompute
  13. 2026-10-02 19:39 UTCGHSA enrichment
  14. 2026-10-02 17:57 UTCEPSS rescore
  15. 2026-10-02 15:44 UTCGHSA enrichment
  16. 2026-10-02 11:50 UTCGHSA enrichment
  17. 2026-10-02 07:52 UTCGHSA enrichment
  18. 2026-10-02 03:58 UTCGHSA enrichment
  19. 2026-10-02 00:02 UTCEG score recompute
  20. 2026-10-02 00:02 UTCGHSA enrichment
  21. 2026-10-01 19:50 UTCEPSS rescore
  22. 2026-10-01 19:46 UTCGHSA enrichment
  23. 2026-10-01 15:52 UTCGHSA enrichment
  24. 2026-10-01 11:58 UTCGHSA enrichment
  25. 2026-10-01 08:03 UTCGHSA enrichment
Show 35 more
  1. 2026-10-01 04:09 UTCGHSA enrichment
  2. 2026-10-01 00:14 UTCGHSA enrichment
  3. 2026-09-30 20:11 UTCGHSA enrichment
  4. 2026-09-30 16:17 UTCEG score recompute
  5. 2026-09-30 16:17 UTCGHSA enrichment
  6. 2026-09-30 15:04 UTCEPSS rescore
  7. 2026-09-30 11:57 UTCGHSA enrichment
  8. 2026-09-30 08:03 UTCGHSA enrichment
  9. 2026-09-30 04:08 UTCGHSA enrichment
  10. 2026-09-30 00:05 UTCGHSA enrichment
  11. 2026-09-29 20:10 UTCGHSA enrichment
  12. 2026-09-29 16:14 UTCEG score recompute
  13. 2026-09-29 16:14 UTCGHSA enrichment
  14. 2026-09-29 12:19 UTCGHSA enrichment
  15. 2026-09-29 08:25 UTCGHSA enrichment
  16. 2026-09-29 04:31 UTCEG score recompute
  17. 2026-09-29 04:31 UTCGHSA enrichment
  18. 2026-09-29 04:00 UTCEG score recompute
  19. 2026-09-29 04:00 UTCGHSA enrichment
  20. 2026-09-29 02:14 UTCGHSA enrichment
  21. 2026-09-28 22:19 UTCEG score recompute
  22. 2026-09-28 22:19 UTCGHSA enrichment
  23. 2026-09-28 18:25 UTCGHSA enrichment
  24. 2026-09-28 14:30 UTCGHSA enrichment
  25. 2026-09-28 14:25 UTCEG score recompute
  26. 2026-09-28 14:25 UTCGHSA enrichment
  27. 2026-09-28 13:52 UTCEPSS rescore
  28. 2026-09-28 13:44 UTCEG score recompute
  29. 2026-09-28 13:44 UTCGHSA enrichment
  30. 2026-09-28 13:26 UTCGHSA enrichment
  31. 2026-09-28 09:32 UTCEG score recompute
  32. 2026-09-28 09:32 UTCGHSA enrichment
  33. 2026-09-28 08:29 UTCEG score recompute
  34. 2026-09-28 08:08 UTCEG score recompute
  35. 2026-09-28 08:07 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82384?
CVE-2026-82384 is a critical vulnerability published on September 28, 2026. Deserialization of Untrusted Data in Apache Roller 6.1.5 allows an unauthenticated remote attacker to cause deserialization of attacker-controlled bytes, because the XML-RPC endpoint accepts vendor extension types that are deserialized during request parsing, before authentication. The servlet is…
When was CVE-2026-82384 disclosed?
CVE-2026-82384 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-2026-82384 actively exploited?
CVE-2026-82384 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82384?
CVE-2026-82384 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82384?
An upstream fix for CVE-2026-82384 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-2026-82384 are linked in the Vendor Advisories panel on this page.

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