CVE-2026-100871

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-27. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 fail to include firewall identification in JWT tokens issued by separate Admin and Shop API endpoints. Attackers can register a shop customer account using an administrator's email address and obtain a token that the Admin API resolves to that administrator, granting full administrative access.

CVSS v3
8.8
EG Score
8.8HIGHhigh confidence
EG Risk
40
EG Risk 40/100CISA 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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 27, 2026

Last Modified

September 30, 2026

Advisory Details (6)

Auto-updated Sep 27, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
generic

Sylius before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 JWT Audience Confusion Allows Admin API Authentication | Advisories | VulnCheck

https://www.vulncheck.com/advisories/sylius-before-1.12.25-1.13.17-1.14.20-2.1.16-and-2.2.9-jwt-audience-confusion-allows-admin-api-authentication
github Patch Available

JWT audience confusion allows shop customer to authenticate as administrator · Advisory · Sylius/Sylius · GitHub

Affected: versions: 1.12.25, 1.13.17, 1.14.20, 2.1.16, 2.2.9 and above.

https://github.com/Sylius/Sylius/security/advisories/GHSA-f6mx-qxjc-55xf
github_release Patch Available

v2.2.9

Patch available: Sylius/Sylius v2.2.9

https://github.com/Sylius/Sylius/releases/tag/v2.2.9
github_pr Patch Available

[2.2] Add JwtAudienceListener to enforce JWT audience and principal validation

Patch available: Sylius/Sylius v2.2.9 (PR #19213 merged 2026-09-02)

https://github.com/Sylius/Sylius/pull/19213
github_commit Patch Available

commit cdfb672a4d17 (Sylius/Sylius)

Patch available: Sylius/Sylius v2.2.9 (contains commit cdfb672a4d17)

https://github.com/Sylius/Sylius/commit/cdfb672a4d174eb2c73159b25cf5b5f44088f45c
generic

GitHub - Sylius/Sylius: Headless open-source eCommerce platform on top of PHP/Symfony/API Platform · GitHub

https://github.com/Sylius/Sylius

Vendor Advisories for CVE-2026-100871(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 31× in last 7d / 34× 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 03:43 UTCGHSA enrichment
  2. 2026-10-03 15:51 UTCEG score recompute
  3. 2026-10-03 15:51 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 03:56 UTCEG score recompute
  6. 2026-10-03 03:56 UTCGHSA enrichment
  7. 2026-10-02 16:02 UTCGHSA enrichment
  8. 2026-10-02 04:10 UTCEG score recompute
  9. 2026-10-02 04:09 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 16:15 UTCGHSA enrichment
  12. 2026-10-01 04:22 UTCGHSA enrichment
  13. 2026-09-30 16:27 UTCEG score recompute
  14. 2026-09-30 16:27 UTCGHSA enrichment
  15. 2026-09-30 15:46 UTCEG score recompute
  16. 2026-09-30 15:46 UTCGHSA enrichment
  17. 2026-09-30 15:02 UTCEPSS rescore
  18. 2026-09-30 11:40 UTCGHSA enrichment
  19. 2026-09-29 23:47 UTCEG score recompute
  20. 2026-09-29 23:47 UTCGHSA enrichment
  21. 2026-09-29 15:20 UTCEPSS rescore
  22. 2026-09-29 09:08 UTCEG score recompute
  23. 2026-09-29 09:08 UTCGHSA enrichment
  24. 2026-09-28 21:13 UTCEG score recompute
  25. 2026-09-28 21:13 UTCGHSA enrichment
Show 9 more
  1. 2026-09-28 14:20 UTCEG score recompute
  2. 2026-09-28 14:20 UTCGHSA enrichment
  3. 2026-09-28 13:50 UTCEPSS rescore
  4. 2026-09-28 02:28 UTCEG score recompute
  5. 2026-09-28 02:28 UTCGHSA enrichment
  6. 2026-09-27 14:35 UTCEG score recompute
  7. 2026-09-27 13:18 UTCEG score recompute
  8. 2026-09-27 13:16 UTCEG score recompute
  9. 2026-09-27 13:15 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100871?
CVE-2026-100871 is a high vulnerability published on September 27, 2026. Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 fail to include firewall identification in JWT tokens issued by separate Admin and Shop API endpoints. Attackers can register a shop customer account using an administrator's email address and obtain a token that the Admin API…
When was CVE-2026-100871 disclosed?
CVE-2026-100871 was first published on September 27, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100871 actively exploited?
CVE-2026-100871 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100871?
CVE-2026-100871 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100871?
A fix for CVE-2026-100871 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100871 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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