CVE-2026-33140 json
PySpector: Stored XSS in PySpector HTML Report Generation leads to Javascript Code Execution
published 2026-03-18 7 mo ago modified 2026-07-13 3 mo ago also GHSA-2gmv-2r3v-jxj2 , PYSEC-2026-3029 , EUVD-2026-13776
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
PySpector is a static analysis security testing (SAST) Framework engineered for modern Python development workflows. PySpector versions 0.1.6 and prior are affected by a stored Cross-Site Scripting (XSS) vulnerability in the HTML report generator. When PySpector scans a Python file containing JavaScript payloads (i.e. inside a string passed to eval() ), the flagged code snippet is interpolated into the HTML report without sanitization. Opening the generated report in a browser causes the embedded JavaScript to execute in the browser's local file context. This issue has been patched in version 0.1.7.
Patch / fix
- pypi pyspector 0.1.7
- parzivalhack pyspector 0.1.7
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/ParzivalHack/PySpector/security/advisories/GHSA-2gmv-2r3v-jxj2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pyspector | <0.1.7 |
0.1.7 |
Affected products
- ParzivalHack PySpector
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/ParzivalHack/PySpector/security/advisories/GHSA-2gmv-2r3v-jxj2
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-33140
advisory
-
github.com
/ParzivalHack/PySpector
package
-
pypi.org
/project/pyspector
package
-
github.com
/advisories/GHSA-2gmv-2r3v-jxj2
advisory
Sources
- CVE List CVE-2026-33140
- GitHub Advisory GHSA-2gmv-2r3v-jxj2
- NVD CVE-2026-33140
- OSV PYSEC-2026-3029
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.