CVE-2026-102633: expat security update
Affects expatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited : upgrade to 2.5.0-6.el8_10 soon.
Data as of 29 Oct 2026, 14:41 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 30% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.5.0-6.el8_10
Exploitation evidence
Disclosed: evidence found.
CVE published 29 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade the AlmaLinux to 2.5.0-6.el8_10.
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| AlmaLinux 8expat | Affected
| Fixed in
|
| AlmaLinux 8expat-devel | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A security update is available and should be applied. Red Hat has released expat version 2.5.0-6.el8_10 which fixes these vulnerabilities. Users should update affected systems to this version or later. No additional mitigation actions are required beyond applying the official patch.
Description
Expat, a C library for parsing XML documents, has a security update addressing two vulnerabilities: a denial of service caused by an integer overflow in the expat_realloc function (CVE-2026-102633) and an information disclosure via a heap buffer over-read in XML_ParseBuffer (CVE-2026-77214). These issues affect versions prior to 2.5.0-6.el8_10. Red Hat has released a patched version 2.5.0-6.el8_10 to mitigate these vulnerabilities.
References
- access.redhat.com/errata/RHSA-2026:92323 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-102633 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-77214 (opens in a new tab)
- bugzilla.redhat.com/2543288 (opens in a new tab)
- bugzilla.redhat.com/2547476 (opens in a new tab)
- errata.almalinux.org/8/ALSA-2026-92323.html (opens in a new tab)