CVE-2026-11878
XSS in OpenText Access Manager web UI allows session theft.
Is CVE-2026-11878 being exploited?
Not confirmed. CVE-2026-11878 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.22% probability of exploitation in the next 30 days.
How severe is CVE-2026-11878?
CVE-2026-11878 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-11878?
Yes. A fix has been recorded for CVE-2026-11878. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-11878 affect?
CVE-2026-11878 affects OpenText Access Manager 5.1 - 5.1.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-11878?
Upgrade to 5.1.3+; validate inputs; deploy WAF
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can execute scripts in a victim's browser via the web UI, enabling cookie/session theft and possible account takeover.
Patch when possible
- affected>= 5.1 and <= 5.1.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.