CVE-2026-66293: XML injection in the encoder of Saxy

Routine

LOW 2.1UPGRADE

CVE-2026-66293 is a low-severity flaw (CVSS 2.1) affecting saxy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XML injection in the encoder of Saxy. Saxy.Encoder does not neutralize the -- sequence in XML comment content: escape_comment/2 returns the comment binary unchanged in every clause and only appends a space when the comment ends in a single -, so neither an interior -- nor a full --> is escaped or rejected before the encoder wraps the content in the  delimiters. When an application serializes attacker-controlled text as a comment, thr

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-91
Published	2026-11-06
Last modified	2026-11-06

Publisher (CNA): EEF · Vendor: qcam · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-06 10:16 UTCPublished CVE record published
2026-11-06 10:16 UTCUpdated Record last modified

qcam saxy UPGRADE

Affected: >= 0.7.0 and < 1.7.0

Fixed in: 1.7.0

Safe to downgrade to: a release before 0.7.0

1. Check installed version

apt-cache policy saxy || rpm -q saxy || saxy --version

2. UPGRADE to 1.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade saxy

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade saxy

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.7.0 (Debian / Ubuntu)

apt-cache madison saxy sudo apt install saxy=<VERSION_BEFORE_0.7.0> sudo apt-mark hold saxy

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list saxy sudo dnf downgrade saxy-<VERSION_BEFORE_0.7.0> sudo dnf versionlock add saxy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Research and news

Vulners Bulletins: CVE-2026-66293 XML comment injection in Saxy encoder via unescaped double hyphen 2026-11-06

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-66293?

saxy: upgrade to 1.7.0. Exact commands for each OS are on this page.

Is CVE-2026-66293 being exploited?

CVE-2026-66293 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-66293 affect?

CVE-2026-66293 affects saxy. Severity is low (CVSS 2.1). XML injection in the encoder of Saxy. Saxy.Encoder does not neutralize the -- sequence in XML comment content: escape_comment/2 returns the comment binary unchanged in every clause and only appends a space when the comment ends in a single

How urgent is CVE-2026-66293?

Priority 7/100. No elevated risk signals yet.

Related CVEs

CVE-2026-66294 LOW 2.1 UPGRADE XML injection in the Saxy XML encoder
CVE-2026-66295 LOW 2.1 UPGRADE Saxy's XML encoder writes the target and the content of a processing instruction into the output document verb

References

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