yoanbernabeu grepai up to 0.35.0 Postgres Embedding Cache indexer/chunker.go PostgresStore.LookupByContentHash content_hash weak hash

Summaryinfo

A vulnerability was found in yoanbernabeu grepai up to 0.35.0. It has been classified as problematic. The impacted element is the function PostgresStore.LookupByContentHash of the file indexer/chunker.go of the component Postgres Embedding Cache. The manipulation of the argument content_hash leads to weak hash. This vulnerability is documented as CVE-2026-11481. The attack needs to be performed locally. Additionally, an exploit exists. The pull request to fix this issue awaits acceptance.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in yoanbernabeu grepai up to 0.35.0. This issue affects the function PostgresStore.LookupByContentHash of the file indexer/chunker.go of the component Postgres Embedding Cache. The manipulation of the argument content_hash with an unknown input leads to a weak hash vulnerability. Using CWE to declare the problem leads to CWE-328. The product uses an algorithm that produces a digest (output value) that does not meet security expectations for a hash function that allows an adversary to reasonably determine the original input (preimage attack), find another input that can produce the same hash (2nd preimage attack), or find multiple inputs that evaluate to the same hash (birthday attack). Impacted is confidentiality.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-11481. The exploitation is known to be difficult. An attack has to be approached locally. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

The exploit is available at github.com. It is declared as proof-of-concept. The pull request to fix this issue awaits acceptance.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-35012). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• yoanbernabeu

Name

• grepai

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35.0

Website

• Product: https://github.com/yoanbernabeu/grepai/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #833997: yoanbernabeu grepai v0.35.0-1-gf6dbf8d Cache Poisoning (by Dem000)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion