CVE-2026-86257General

LOWCVSS 4.8 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-1236

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
General: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

General

1100.0%

Referenced assets1 URL

By indicator

https://www.cve.org/CVERecord?id=CVE-2026-86257

Full discourse1 post

CVE@CVEnew46d
General
CVE-2026-86257 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. Attac… https://www.cve.org/CVERecord?id=CVE-2026-86257
Post summary
The tweet outlines the technical details of CVE-2026-86257—a sanitization weakness in wger’s TSV export endpoint that permits spreadsheet formula injection—but offers no proof of exploitation, PoC, patch, or active attacks.
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