# Whatstk vulnerabilities

Source: https://junglewise.ai/threats/technologies/whatstk  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/whatstk.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Whatstk: 1 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-121691, was published on 10 November 2026. 2 vulnerabilities in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 1
- Last 30 days: 3
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About Whatstk

Python library for WhatsApp chat analysis and data processing.

## Latest Whatstk vulnerabilities

- [CVE-2026-121691: whatstk ZIP loader improper compression handling](https://junglewise.ai/threats/cve-2026-121691-improper-handling-of-highly-compressed-data-cwe-409-in-the-zip) (info, published 10 Nov 2026)
- [CVE-2026-121577: whatstk inefficient regular expression in header parsing](https://junglewise.ai/threats/cve-2026-121577-inefficient-regular-expression-complexity-cwe-1333-in-generate) (info, published 3 Nov 2026)
- [CVE-2026-121564: whatstk message loss in merge_chats() due to incomplete date comparison](https://junglewise.ai/threats/cve-2026-121564-incomplete-comparison-with-missing-factors-cwe-1023-in-merge) (info, published 3 Nov 2026)

## Most severe Whatstk vulnerabilities

- [CVE-2026-121691: whatstk ZIP loader improper compression handling](https://junglewise.ai/threats/cve-2026-121691-improper-handling-of-highly-compressed-data-cwe-409-in-the-zip) (info, published 10 Nov 2026)
- [CVE-2026-121577: whatstk inefficient regular expression in header parsing](https://junglewise.ai/threats/cve-2026-121577-inefficient-regular-expression-complexity-cwe-1333-in-generate) (info, published 3 Nov 2026)
- [CVE-2026-121564: whatstk message loss in merge_chats() due to incomplete date comparison](https://junglewise.ai/threats/cve-2026-121564-incomplete-comparison-with-missing-factors-cwe-1023-in-merge) (info, published 3 Nov 2026)

## Vulnerabilities per week

2 vulnerabilities in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 2 | 0 | 0 |
| 9 Nov 2026 | 1 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Whatstk vulnerabilities", https://junglewise.ai/threats/technologies/whatstk, 12 November 2026.