CVE-2026-100118: CAI Content Credentials is affected by an Improper Certificate Validation vulnerability that could result in a

Q: How do I fix CVE-2026-100118?

c2pa: upgrade to 0.91.1; c2pa-web: upgrade to 0.15.3; c2patool: upgrade to 0.28.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-100118 being exploited?

CVE-2026-100118 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-100118 affect?

CVE-2026-100118 affects c2pa, c2pa-web, c2patool. Severity is high (CVSS 7.5). CAI Content Credentials is affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write ac

Q: How urgent is CVE-2026-100118?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE

CVE-2026-100118 is a high-severity flaw (CVSS 7.5) affecting c2pa, c2pa-web, c2patool. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CAI Content Credentials is affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploitation of this issue does not require user interaction.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-295
Published	2026-10-13
Last modified	2026-10-17

Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

Last updated 2026-10-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-13 22:17 UTCPublished CVE record published
2026-10-17 02:17 UTCUpdated Record last modified

adobe c2pa UPGRADE

Affected: < 0.91.1

Fixed in: 0.91.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy c2pa || rpm -q c2pa || c2pa --version

2. UPGRADE to 0.91.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade c2pa

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade c2pa

Note

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

adobe c2pa-web UPGRADE

Affected: < 0.15.3

Fixed in: 0.15.3

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls c2pa-web

2. UPGRADE to 0.15.3

npm install c2pa-web@">=0.15.3"

adobe c2patool UPGRADE

Affected: < 0.28.1

Fixed in: 0.28.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy c2patool || rpm -q c2patool || c2patool --version

2. UPGRADE to 0.28.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade c2patool

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade c2patool

Note

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

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-2026-100118?

c2pa: upgrade to 0.91.1; c2pa-web: upgrade to 0.15.3; c2patool: upgrade to 0.28.1. Exact commands for each OS are on this page.

Is CVE-2026-100118 being exploited?

CVE-2026-100118 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-2026-100118 affect?

CVE-2026-100118 affects c2pa, c2pa-web, c2patool. Severity is high (CVSS 7.5). CAI Content Credentials is affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write ac

How urgent is CVE-2026-100118?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-34665 HIGH 7.5 UPGRADE UPGRADE CAI Content Credentials versions c2pa-web@0.7.0, c2pa-v0.78.2 and earlier are affected by an Uncontrolled Reso
CVE-2026-34666 MEDIUM 6.2 UPGRADE UPGRADE CAI Content Credentials versions c2pa-web@0.7.0, c2pa-v0.78.2 and earlier are affected by an Improper Input Va
CVE-2026-34667 MEDIUM 6.2 UPGRADE UPGRADE CAI Content Credentials versions c2pa-web@0.7.0, c2pa-v0.78.2 and earlier are affected by an Integer Underflow
CVE-2026-34670 MEDIUM 6.2 UPGRADE UPGRADE CAI Content Credentials versions c2pa-web@0.7.0, c2pa-v0.78.2 and earlier are affected by an Improper Input Va
CVE-2026-34672 MEDIUM 6.2 UPGRADE UPGRADE CAI Content Credentials versions c2pa-web@0.7.0, c2pa-v0.78.2 and earlier are affected by an Integer Underflow

References

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