# CVE-2026-33454 — Apache Camel

> As of 2026-06-29, CVE-2026-33454 is a CRITICAL-severity vulnerability in Apache Camel, CVSS v3.1 9.4, EPSS 0.6% (45.5th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-33454, most recently “SAP July 2026 Patch Day: Critical Memory Corruption in NetWeaver ABAP (CVE-2026-44747, CVSS 9.9) Among 16 Security Notes”.

**Last updated:** 2026-06-29

## What is CVE-2026-33454?

The Camel-Mail component is vulnerable to Camel message header injection. The custom header filter strategy used by the component (MailHeaderFilterStrategy) only filters the 'out' direction via setOutFilterStartsWith, while it does not configure the 'in' direction via setInFilterStartsWith. As a result, when a Camel application consumes mail through camel-mail (for example via from(\"imap://...\") or from(\"pop3://...\")) the inbound filter check is skipped and Camel-prefixed MIME headers are mapped unfiltered into the Exchange. An attacker who can deliver an email to a mailbox monitored by such a consumer can inject Camel-specific headers that, for some Camel components downstream of the mail consumer (such as camel-bean, camel-exec, or camel-sql), can alter the behaviour of the route. This is the same pattern that was previously addressed in camel-undertow (CVE-2025-30177) and the broader incoming-header filter (CVE-2025-27636 and CVE-2025-29891). This issue affects Apache Camel: from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.1. Users are recommended to upgrade to version 4.19.0, which fixes the issue. If users are on the 4.18.x LTS releases stream, then they are suggested to upgrade to 4.18.1. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6.

The record classifies CVE-2026-33454 under weakness classes [CWE-502](https://cwe.mitre.org/data/definitions/502.html), [CWE-1173](https://cwe.mitre.org/data/definitions/1173.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 139 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.4 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L`)
- **EPSS (FIRST):** 0.6% probability of exploitation in the next 30 days, higher than 45.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 8.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-04-27, last modified 2026-06-29

## Is CVE-2026-33454 being exploited?

Weaponised exploit code for CVE-2026-33454 is publicly available. 1 public proof-of-concept repository is tracked for this identifier.

- [oscerd/CVE-2026-33454](https://github.com/oscerd/CVE-2026-33454) (github)

## Affected products and versions

- **Apache Software Foundation**: Apache Camel

Affected software packages:

- `maven:org.apache.camel:camel-mail` — patched in 4.14.6
- `maven:org.apache.camel:camel-mail` — patched in 4.18.1

## How to fix CVE-2026-33454

Fixed versions are recorded for 2 packages: maven:org.apache.camel:camel-mail 4.14.6, maven:org.apache.camel:camel-mail 4.18.1. Vendor advisory: [https://camel.apache.org/security/CVE-2026-33454.html](https://camel.apache.org/security/CVE-2026-33454.html). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-33454

1 tracked threat in the Threadlinqs corpus references CVE-2026-33454, either in the campaign’s CVE list or as an indicator on the campaign record.

- [SAP July 2026 Patch Day: Critical Memory Corruption in NetWeaver ABAP (CVE-2026-44747, CVSS 9.9) Among 16 Security Notes](https://intel.threadlinqs.com/threat/TL-2026-1303) — CRITICAL · 2026-07-14

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-07-14. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [camel.apache.org — vendor advisory](https://camel.apache.org/security/CVE-2026-33454.html)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-33454
Full detection coverage and IOCs for threats exploiting CVE-2026-33454 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp