CVE-2026-34159Exploit(ggml / llama.cpp)

MEDIUMCVSS 9.8 · CRITICAL

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Patch ggml llama.cpp systems immediately
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD description

llama.cpp is an inference of several LLM models in C/C++. Prior to version b8492, the RPC backend's deserialize_tensor() skips all bounds validation when a tensor's buffer field is 0. An unauthenticated attacker can read and write arbitrary process memory via crafted GRAPH_COMPUTE messages. Combined with pointer leaks from ALLOC_BUFFER/BUFFER_GET_BASE, this gives full ASLR bypass and remote code execution. No authentication required, just TCP access to the RPC server port. This issue has been patched in version b8492.

ggml CVEs Back to dashboard

4.3/ 10 priority

Sources & remediation

Patch / fix

Exploit / PoC references

https://github.com/ggml-org/llama.cpp/security/advisories/GHSA-j8rj-fmpv-wcxw

Weakness type (CWE)

CWE-119

Priority

MEDIUM

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

llama.cpp

Threat summary

Public PoC and exploit tooling are both present
Patch or workaround signal is available
15 mentions across 9 observed days
Momentum state: stable

What's happening

Exploit tool or code specified in 5 signals
PoC mentioned or linked in 7 signals
Patch or workaround mentioned in 2 signals
Technical details provided in 13 signals
Disclosure: 4 classified signals
Peaked 5d ago at 3 mentions (2026-04-25); latest day: 1
15 total mentions across 9 days

Affected systems

Vendors

ggml

Products

llama.cpp

Deep dive

Activity timeline15 mentions / 9d

Signal classification5 categories

Exploit

533.3%

Disclosure

426.7%

Patch

213.3%

PoC

213.3%

General

213.3%

Referenced assets11 URLs

By indicator

Classification over time

Date	Total	Labels

2026-04-01	1	Disclosure1
2026-04-02	2	Disclosure1Patch1
2026-04-24	1	Exploit1
2026-04-25	3	Exploit2PoC1
2026-04-26	2	Disclosure1Exploit1
2026-04-27	1	Exploit1
2026-05-03	1	Patch1
2026-05-12	3	Disclosure1General2
2026-05-31	1	PoC1

Full discourse15 posts

Hassan Ali@casp3r0x0167d
Exploit
Lets write an 1-day Zero Click #exploit ! for CVE-2026-34159 llama.cpp and hack into #AI infrastructure ! blog post : https://www.pwntricks.com/ZeroClick-RCE-CVE-2026-34159-llama.cpp exploit https://github.com/casp3r0x0/CVE-2026-34159 #Cyber #Security #OSCP #ExploitDevelopment https://t.co/K8vVCsITCl
Post summary
The tweet promotes a zero‑click exploit for CVE‑2026‑34159, providing a blog post and GitHub repository with PoC code, but no evidence of active exploitation or patch information.
266132424119.0K
222 followersView on X
NullSecurityX@NullSecurityX165d
Exploit
Exploiting llama.cpp’s RPC Server - From Null Buffer to RCE Against PIE + Full RELRO + NX | CVE-2026-34159: The vulnerability is a one-line logic bug in the RPC server’s tensor deserialization pipeline. Youtube: https://www.youtube.com/@NullSecurityX Blog: https://www.pwntricks.com/ZeroClick-RCE-CVE-2026-34159-llama.cpp https://t.co/9TzOyEpTbM
Post summary
The post discloses a logic‑bug‑driven RCE in llama.cpp’s RPC server, with linked videos and a blog that provide a proof‑of‑concept exploit.
243023412219.6K
12.3K followersView on X
KF@d0tslash166d
Exploit
"0 Click RCE exploit for CVE-2026-34159 Lama.cpp RPC server version b8487" https://github.com/casp3r0x0/CVE-2026-34159 https://t.co/qlqiseuhrB
Post summary
A zero‑click remote code execution exploit for CVE‑2026‑34159 has been released, with code available on GitHub and no indicators of active exploitation or available patches.
1210965912.1K
11.3K followersView on X
KF@d0tslash166d
Exploit
"CVE-2026-34159: Exploiting llama.cpp’s RPC Server - From Null Buffer to RCE Against PIE + Full RELRO + NX" https://www.pwntricks.com/ZeroClick-RCE-CVE-2026-34159-llama.cpp https://t.co/oKYETO7zGt
Post summary
The tweet promotes a ZeroClick RCE demonstration for CVE‑2026‑34159 in llama.cpp, providing PoC and exploit details but making no claim of live exploitation or available fixes.
06111612.7K
11.3K followersView on X
Blue Team News@blueteamsec1130d
PoC
CVE-2026-34159: Exploiting llama.cpp’s RPC Server - From Null Buffer to RCE Against PIE + Full RELRO + NX http://dlvr.it/TSpK2r #cyber #threathunting #infosec
Post summary
The post announces CVE‑2026‑34159, describing a null‑buffer RCE against llama.cpp’s RPC server and providing a link for further details or a proof‑of‑concept, but it does not mention active exploitation, a patch, or debunking.
02020752
56.6K followersView on X
Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters158d
Patch
CVE-2026-34159: llama.cpp RPC backend has an unauthenticated, no-bounds-check RCE. Zero buffer field in deserialize_tensor() allows arbitrary memory read/write. No auth, low complexity, CVSS 9.8. Patch to b8492 immediately. #cybersecurity #infosec #business #devsecops info:
Post summary
This post announces a high‑severity unauthenticated RCE in llama.cpp’s RPC backend, provides technical details, and notes that a patch (commit b8492) is immediately available.
10010130
889 followersView on X
FAMASoon@FAMASoon166d
PoC
Zeroclick Rce Cve 2026 34159 Llama.cpp - https://www.pwntricks.com/ZeroClick-RCE-CVE-2026-34159-llama.cpp
Post summary
The note points to CVE‑2026‑34159 and a link that appears to host a Proof of Concept for a ZeroClick RCE, but offers no evidence of active exploitation or remediation.
00002235
993 followersView on X
Lyrie.ai@lyrie_ai149d
General
Unpopular opinion: The cybersecurity industry is selling you dashboards. CVE: CVE-2026-34159 CVSS: 9.8 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity: CRITICAL Status: Critical advisory
Post summary
The post lists CVE‑2026‑34159 with a critical score but provides no exploitation, mitigation, or PoC details.
1000039
210 followersView on X
Hacking Team@HackingTeam77164d
Exploit
Lets write an 1-day Zero Click #exploit ! for CVE-2026-34159 llama.cpp and hack into #AI infrastructure ! blog post : https://pwntricks.com/ZeroClick-RCE-CVE-2026-34159-llama.cpp exploit https://github.com/casp3r0x0/CVE-2026-34159 #Cyber #Security #OSCP #ExploitDevelopment SRC:https://x.com/casp3r0x0/status/2047622881635385662?s=20 https://t.co/Zqxpr8olW5
Post summary
The post announces a zero-click exploit for CVE-2026-34159 against llama.cpp, offering links to a blog post and a GitHub repository that contain the PoC and exploit code.
00010400
1.8K followersView on X
Lyrie.ai@lyrie_ai149d
General
https://lyrie.ai/research/research/cve-2026-34159-ggml-llama-cpp #lyrie #cybersecurity #CVE #threatintel #zerodayattack
Post summary
The text references a CVE (2026-34159) via a link but does not provide explicit details, PoC, exploit, patch information, or evidence of active exploitation.
0000024
210 followersView on X
Lyrie.ai@lyrie_ai149d
Disclosure
CRITICAL: CVE-2026-34159 (CVSS 9.8) — ggml llama.cpp. CVE: CVE-2026-34159 CVSS: 9.8 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity: CRITICAL Status: Critical advisory
Post summary
The post announces CVE-2026-34159 as a critical vulnerability in ggml llama.cpp, providing its CVSS score and attack vector, but offers no details on exploitation, tools, or remediation.
0000043
210 followersView on X
Outis@xfeylesof165d
Disclosure
From Null Buffer to RCE Against PIE + Full RELRO + NX | CVE-2026-34159: The vulnerability is a one-line logic bug in the RPC server’s tensor deserialization pipeline. Youtube: http://youtube.com/@NullSecurityX #BugBounty #CyberSecurity
Post summary
The post announces the identification of a new logic‑bug vulnerability in an RPC server’s tensor deserialization, marking CVE‑2026‑34159 as disclosed.
00000219
1.8K followersView on X
CVEFind.com@CveFindCom189d
Patch
[CVE-2026-34159: CRITICAL] Critical vulnerability in llama.cpp prior to version b8492 allows unauthenticated attackers to achieve remote code execution by crafting GRAPH_COMPUTE messages. Patch available in ...#cve,CVE-2026-34159,#cybersecurity https://cvefind.com/CVE-2026-34159
Post summary
A critical RCE vulnerability was disclosed in llama.cpp prior to commit b8492; a patch is now available to mitigate the flaw.
0000031
617 followersView on X
The Hacker Wire@TheHackerWire189d
Disclosure
🔴 CVE-2026-34159 - Critical llama.cpp is an inference of several LLM models in C/C++. Prior to version b8492, the RPC backend's deserialize_tensor() skips all bounds validation when a tensor's buffer field is 0. An ... https://www.thehackerwire.com/vulnerability/CVE-2026-34159/ https://t.co/u6gyLLYFO8
Post summary
The tweet discloses a critical vulnerability (CVE-2026-34159) in llama.cpp where the RPC deserialization function ignores bounds checks, potentially enabling memory corruption.
0000057
163 followersView on X
0day Signal@0dayPublishing190d
Disclosure
🚨 CVE-2026-34159: llama.cpp: Unauthenticated RCE v... Zero bounds checking on buffer=0 tensors turns every llama.cpp RPC server into a memory corruption playground—ASLR bypa... https://zerodaysignal.com/vulnerability/CVE-2026-34159 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The tweet announces CVE‑2026‑34159, a memory‑corruption based unauthenticated RCE vulnerability in llama.cpp, and links to a zero‑day signal page for more details.
00000108
194 followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	ggml	llama.cpp	-	-	-

Explore more

Back to dashboard ggml CVEs llama.cpp vulnerabilities

What researchers are saying

CVE-2026-34159

NullSecurityX[verified]@NullSecurityXExploit

The post discloses a logic‑bug‑driven RCE in llama.cpp’s RPC server, with linked videos and a blog that provide a proof‑of‑concept exploit.

KF[verified]@d0tslashExploit

A zero‑click remote code execution exploit for CVE‑2026‑34159 has been released, with code available on GitHub and no indicators of active exploitation or available patches.

KF[verified]@d0tslashExploit

The tweet promotes a ZeroClick RCE demonstration for CVE‑2026‑34159 in llama.cpp, providing PoC and exploit details but making no claim of live exploitation or available fixes.

Blue Team News[verified]@blueteamsec1PoC

The post announces CVE‑2026‑34159, describing a null‑buffer RCE against llama.cpp’s RPC server and providing a link for further details or a proof‑of‑concept, but it does not mention active exploitation, a patch, or debunking.

Hugo | DevOps | Cybersecurity 🇱🇻[verified]@HugoValtersPatch

This post announces a high‑severity unauthenticated RCE in llama.cpp’s RPC backend, provides technical details, and notes that a patch (commit b8492) is immediately available.

Lyrie.ai[verified]@lyrie_aiGeneral

The post lists CVE‑2026‑34159 with a critical score but provides no exploitation, mitigation, or PoC details.

Lyrie.ai[verified]@lyrie_aiGeneral

The text references a CVE (2026-34159) via a link but does not provide explicit details, PoC, exploit, patch information, or evidence of active exploitation.

Lyrie.ai[verified]@lyrie_aiDisclosure

The post announces CVE-2026-34159 as a critical vulnerability in ggml llama.cpp, providing its CVSS score and attack vector, but offers no details on exploitation, tools, or remediation.