CVE-2026-86257Medium· 5.4▾ TwilightPoC available

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

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 ex…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score42/ 100 · Moderate

impact 29.7 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Sep 6, 2026

Updated

Sep 8, 2026

CVSS

5.4

Vendor

wger-project

Product

wger

CWE

CWE-1236

Depth score

42 · Moderate

EPSS

0.28% · p20

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Scores by source

OSV 7.4 · NVD 5.4⚖ 2.0-point dispute

CISA SSVC

decided 2026-09-08

Exploitation: poc
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 7.

0.2% → 0.3%▲ 0.1%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

5 events · 19 days

Sep 6, 2026Published
Disclosed via NVD
Sep 7, 2026EPSS first tracked
0.2%
Sep 8, 2026Record revised
Last analysed / modified upstream
Sep 8, 2026Public exploit observed
Exploit / PoC code exists
Sep 25, 2026EPSS peak
0.2% → 0.3%

wger-project CWE-1236 #nvd #cve.org #exploit-available #osv #pip #score-dispute

Affected

wger < 2.6

Patched in

wger 2.6

Full technical detail▾

Overview

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-86257)

Affected packages:

wger < 2.6

Patched in:

wger 2.6

Source: https://osv.dev/vulnerability/GHSA-xq9m-hmp9-fw87

References

Change history

Field changes observed since this record was first indexed.

Sep 8, 2026Public exploit / PoC published
Sep 8, 2026Public exploit flag cleared
Sep 8, 2026Public exploit / PoC published
Sep 8, 2026Public exploit flag cleared
Sep 8, 2026Public exploit / PoC published

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org#exploit-available#osv#pip#score-dispute

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