CVE-2026-85271

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 74% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Open edX Platform enables the authoring and delivery of online learning at any scale. From Redwood until Ulmo and Verawood.1, the add_additional_attributes_to_notifications function in openedx/core/djangoapps/notifications/email/utils.py assigns notification content without sanitizing discussion-title values produced by get_notification_content in openedx/core/djangoapps/notifications/base_notification.py. An enrolled student can place CSS-capable markup in the post_title value supplied by lms/djangoapps/discussion/rest_api/discussions_notifications.py. Digest and batched-email rendering then passes that value through openedx/core/djangoapps/notifications/templates/notifications/digest_content.html as safe HTML, allowing email-open tracking and content spoofing or phishing when another learner opens a CSS-rendering client. The immediate-email path is not affected because it strips title markup and renders a separately sanitized body. This issue is fixed in Ulmo and Verawood.1.

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
26%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 24, 2026

Advisory Details (4)

Auto-updated Sep 18, 2026
Patch available. Sources: github, github_commit.
github_commit

commit 5eae6e51a879 (openedx/openedx-platform)

Fix landed in openedx/openedx-platform commit 5eae6e51a879 — awaiting tagged release

https://github.com/openedx/openedx-platform/commit/5eae6e51a8797cd3b87cc132f5de73d52561c4d7
github_commit

commit 52f2b3bb3e6f (openedx/openedx-platform)

Fix landed in openedx/openedx-platform commit 52f2b3bb3e6f — awaiting tagged release

https://github.com/openedx/openedx-platform/commit/52f2b3bb3e6fac2601c29e8f926c81498d20bb0b
github_commit

commit 2af03d21b414 (openedx/openedx-platform)

Fix landed in openedx/openedx-platform commit 2af03d21b414 — awaiting tagged release

https://github.com/openedx/openedx-platform/commit/2af03d21b4142e53e375c7f3699b313e92ec5121
github Patch Available

Stored CSS Injection in Email Digest Notifications via Unsanitized Thread Title (incomplete patch of GHSA-4xv3-5j4x-q8g4) · Advisory · openedx/openedx-platform · GitHub

https://github.com/openedx/openedx-platform/security/advisories/GHSA-rv5w-f4r5-h77g

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 14× 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. 2026-09-24 19:08 UTCEG score recompute
  2. 2026-09-24 14:04 UTCEPSS rescore
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-22 16:23 UTCEG score recompute
  5. 2026-09-22 16:01 UTCEPSS rescore
  6. 2026-09-22 16:00 UTCEG score recompute
  7. 2026-09-22 01:35 UTCEG score recompute
  8. 2026-09-21 21:09 UTCEPSS rescore
  9. 2026-09-21 00:13 UTCEG score recompute
  10. 2026-09-20 20:16 UTCEPSS rescore
  11. 2026-09-19 22:50 UTCEG score recompute
  12. 2026-09-18 21:27 UTCEG score recompute
  13. 2026-09-18 20:45 UTCEG score recompute
  14. 2026-09-18 20:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85271?
CVE-2026-85271 is a medium vulnerability published on September 18, 2026. Open edX Platform enables the authoring and delivery of online learning at any scale. From Redwood until Ulmo and Verawood.1, the addadditionalattributestonotifications function in openedx/core/djangoapps/notifications/email/utils.py assigns notification content without sanitizing discussion-title…
When was CVE-2026-85271 disclosed?
CVE-2026-85271 was first published in the National Vulnerability Database on September 18, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85271 actively exploited?
CVE-2026-85271 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 73.6% of all scored CVEs.
What is the CVSS score of CVE-2026-85271?
CVE-2026-85271 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-85271?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85271, 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.

Dependency Blast Radius

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