CVE-2026-86257

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-06. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

wger before 2.6 fails to sanitize first_name and last_name fields in the gym member TSV export endpoint, allowing any gym member to inject spreadsheet formulas. Attackers can inject formulas like =HYPERLINK to exfiltrate admin data or execute code when admins open the exported file in Excel or LibreOffice Calc.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

September 6, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 6, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

wger before 2.6 CSV Formula Injection via member export | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wger-before-2.6-csv-formula-injection-via-member-export
github Patch Available🟡 PoC Available

wger: CSV/TSV formula injection in gym member export (first_name/last_name) · Advisory · wger-project/wger · GitHub

https://github.com/wger-project/wger/security/advisories/GHSA-xq9m-hmp9-fw87

Vendor Advisories for CVE-2026-86257(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
wger1.1 ... 2.1 (14 versions)2.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 38× 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. 2026-09-19 02:17 UTCEG score recompute
  2. 2026-09-19 02:17 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 01:59 UTCEG score recompute
  5. 2026-09-18 01:59 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 01:41 UTCEG score recompute
  8. 2026-09-17 01:41 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-16 01:23 UTCEG score recompute
  12. 2026-09-16 01:23 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 01:05 UTCGHSA enrichment
  16. 2026-09-14 00:47 UTCEG score recompute
  17. 2026-09-14 00:47 UTCGHSA enrichment
  18. 2026-09-13 00:29 UTCEG score recompute
  19. 2026-09-13 00:29 UTCGHSA enrichment
  20. 2026-09-12 00:11 UTCEG score recompute
  21. 2026-09-12 00:10 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-10 23:50 UTCEG score recompute
  25. 2026-09-10 23:50 UTCGHSA enrichment
Show 13 more
  1. 2026-09-09 23:19 UTCEG score recompute
  2. 2026-09-09 23:19 UTCGHSA enrichment
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-08 20:13 UTCGHSA enrichment
  5. 2026-09-08 16:51 UTCEG score recompute
  6. 2026-09-08 16:50 UTCGHSA enrichment
  7. 2026-09-08 16:05 UTCEG score recompute
  8. 2026-09-08 16:04 UTCGHSA enrichment
  9. 2026-09-07 14:07 UTCEG score recompute
  10. 2026-09-07 14:07 UTCGHSA enrichment
  11. 2026-09-06 12:22 UTCEG score recompute
  12. 2026-09-06 12:12 UTCEG score recompute
  13. 2026-09-06 12:09 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-86257?
CVE-2026-86257 is a medium vulnerability published on September 6, 2026. wger before 2.6 fails to sanitize firstname and lastname fields in the gym member TSV export endpoint, allowing any gym member to inject spreadsheet formulas. Attackers can inject formulas like =HYPERLINK to exfiltrate admin data or execute code when admins open the exported file in Excel or…
When was CVE-2026-86257 disclosed?
CVE-2026-86257 was first published in the National Vulnerability Database on September 6, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86257 actively exploited?
CVE-2026-86257 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 93.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86257?
CVE-2026-86257 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-86257?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86257, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-86257

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