CVE-2026-12043Disclosure

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2 HEADERS frames. To remediate this issue, users should upgrade to aws-c-http version 0.11.0.

Back to dashboard

0.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-415

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets1 URL

By indicator

https://www.valtersit.com/cve/CVE-2026-12043

Full discourse1 post

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters139d
Disclosure
#CVE-2026-12043 - High severity memory corruption in #AWS aws-c-http. Improper #HPACK table handling could lead to #RCE via crafted HTTP/2 frames. #CVSS 8.8. Upgrade to aws-c-http 0.11.0 immediately. #infosec #cybersecurity #pentester #DevSecOps #DevOps More info: https://www.valtersit.com/cve/CVE-2026-12043
Post summary
A high‑severity memory corruption in AWS’s aws‑c‑http library (CVE‑2026‑12043) can lead to remote code execution through crafted HPACK frames; upgrade to version 0.11.0 is urged for mitigation.
0000033
929 followersView on X

Explore more

Back to dashboard