AEGLIX vulnerability intelligence
CVE-2026-55204
HIGH · CVSS 8.7 · Analyzed
Published: 2026-06-18 · Updated: 2026-10-26 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T10:25:45.339488+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.
Patch review priority
Assess exposure and vendor guidance
- No higher-priority signal is available in the current stored evidence.
FIRST EPSS: 0.48% · percentile 41.5 · score date 2026-10-27.
EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗
Severity and scoring
- CVSS score
- 8.7 · HIGH
- CVSS version
- 4.0
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-476
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Not listed in the CISA catalog retrieved for this record. This does not establish that exploitation has not occurred.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
Before (exclusive): 2.4.36
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
From (inclusive): 2.5
Before (exclusive): 2.6.30
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
From (inclusive): 2.7
Before (exclusive): 2.8.25
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
From (inclusive): 2.9
Before (exclusive): 3.0.24
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
From (inclusive): 3.1
Before (exclusive): 3.2.20
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
From (inclusive): 3.3
Before (exclusive): 3.4.1
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.