CVE-2026-93955Disclosure

LOWCVSS 2.1 · LOW

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

A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue “has already been reported elsewhere.” No fixing commit or pull request is identified there.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-285CWE-639

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

2 mentions across 2 observed days
Momentum state: stable

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 1 mentions (2026-09-20); latest day: 1
2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Hugo | DevOps | Cybersecurity@HugoValters7d
Disclosure
CVE-2026-93955 Grimmory up to 3.4.1: auth bypass via bookId in KoboController download endpoint, CVSS 4.3, public exploit, no patch. Review access controls and watch for updates. #CVE #infosec #cybersecurity https://www.valtersit.com/cve/CVE-2026-93955/ #Grimmory #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet #SysAdmin #cybersecurity #devsecops #devops #developer #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #cybersecurityawareness #cybersecuritynews #cybersecuritytips #python #hacker #kali #ubuntu #debian #docker
Post summary
The tweet announces CVE-2026-93955 with technical details (auth bypass via bookId, CVSS 4.3) and explicitly states no patch is available. This, combined with the absence of named exploits or active wild reports, results in a Disclosure classification.
0000043
1.1K followersView on X
CVE@CVEnew45d
Disclosure
CVE-2026-93955 A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src… https://www.cve.org/CVERecord?id=CVE-2026-93955
Post summary
The text announces CVE-2026-93955 affecting grimmory-tools with limited technical details (function name, file path, versions) but provides no PoC, exploit, patch, or active-exploitation information. The truncated content limits full assessment.
00000847
58.1K followersView on X

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