PatchTheCVECVE-2026-91864: A specially crafted WS-Policy document can pack unlimited content inside a policy assertion, which Neethi copi
CVE-2026-91864 is a high-severity flaw (CVSS 7.5) affecting neethi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A specially crafted WS-Policy document can pack unlimited content inside a policy assertion, which Neethi copies into memory without counting it against its size limits, exhausting the heap (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
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 | 0.7% (top 46%) |
| CISA exploited list | No |
| Weakness | CWE-770 |
| Published | 2026-09-21 |
| Last modified | 2026-09-25 |
Last updated 2026-09-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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-2026-91864?
neethi: upgrade to 3.2.4. Exact commands for each OS are on this page.
Is CVE-2026-91864 being exploited?
CVE-2026-91864 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-2026-91864 affect?
CVE-2026-91864 affects neethi. Severity is high (CVSS 7.5). A specially crafted WS-Policy document can pack unlimited content inside a policy assertion, which Neethi copies into memory without counting it against its size limits, exhausting the heap (denial of service). Users are recommended to upgr
How urgent is CVE-2026-91864?
Priority 50/100. High severity; Remotely exploitable, no login, no user action; On your watchlist
Related CVEs
- CVE-2026-66143 HIGH 7.5 DOWNGRADE It is possible to bypass the maximum number of normalized policy alternatives that was introduced in Apache Ne
- CVE-2026-66142 HIGH 7.5 UPGRADE Apache Neethi is vulnerable to uncontrolled recursion when parsing policies that lack policy Ids or with deepl
- CVE-2026-66144 HIGH 7.5 UPGRADE Although remote policy references are not retrieved during policy normalization, if they are manually retrieve
- CVE-2026-91867 MEDIUM 4.3 UPGRADE When Neethi fetches a remote policy reference, it only limits the time per read, not the whole transfer, so a
- CVE-2026-91865 HIGH 7.5 UPGRADE A small WS-Policy document using repeated policy references can force Neethi to re-expand the same references