CVE-2022-26662 [High] | Security Vulnerability in Proteus

An XML Entity Expansion (XEE) issue was discovered in Tryton Application Platform (Server) 5.x through 5.0.45, 6.x through 6.0.15, and 6.1.x and 6.2.x through 6.2.5, and Tryton Application Platform (Command Line Client (proteus)) 5.x through 5.0.11, 6.x through 6.0.4, and 6.1.x and 6.2.x through 6.2.1. An unauthenticated user can send a crafted XML-RPC message to consume all the resources of the server.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	5.58%	1.88%	-3.70%
2	2025-12-28	4.11%	5.58%	+1.47%
3	2025-12-27	—	4.11%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

5.58%

1.88%

-3.70%

2025-12-28

4.11%

5.58%

+1.47%

2025-12-27

—

4.11%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2022-26662

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-26662 not yet assigned priority: Debian including 2 source packages (tryton-proteus, tryton-server), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10.	https://security-tracker.debian.org/tracker/CVE-2022-26662
`ubuntu`	medium	CVE-2022-26662 medium priority: Ubuntu including 2 source packages (tryton-proteus, tryton-server), 28 status rows across 14 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 14, needs-triage 14.	https://ubuntu.com/security/CVE-2022-26662

Affected software / configurations for CVE-2022-26662

Vendor	Product	Version	Raw CPE
tryton	proteus	>= 5.0.0, < 5.0.12	cpe:2.3:a:tryton:proteus::::::::
tryton	proteus	>= 6.0.0, < 6.0.5	cpe:2.3:a:tryton:proteus::::::::
tryton	proteus	>= 6.2.0, < 6.2.2	cpe:2.3:a:tryton:proteus::::::::
tryton	trytond	>= 5.0.0, < 5.0.46	cpe:2.3:a:tryton:trytond::::::::
tryton	trytond	>= 6.0.0, < 6.0.16	cpe:2.3:a:tryton:trytond::::::::
tryton	trytond	>= 6.2.0, < 6.2.6	cpe:2.3:a:tryton:trytond::::::::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2022-26662

URL	Tags
https://bugs.tryton.org/issue11244	Patch Vendor Advisory
https://discuss.tryton.org/t/security-release-for-issue11219-and-issue11244/5059	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00016.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00017.html	Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5098	Third Party Advisory
https://www.debian.org/security/2022/dsa-5099	Third Party Advisory

URL

CVE-2022-26662

Exploit prediction scoring system (EPSS) score for CVE-2022-26662

Common vulnerability scoring system (CVSS) metrics for CVE-2022-26662

Weakness enumeration for CVE-2022-26662

GitHub Security Advisory for CVE-2022-26662

OS Trackers for CVE-2022-26662

Affected software / configurations for CVE-2022-26662

References for CVE-2022-26662