CVE-2016-5826: libical_project libical Out-of-bounds Read
Vulnerability summary
CVE-2016-5826 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in libical_project libical. EPSS estimates a 3.17% chance of exploitation in the next 30 days, higher than 88% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 27-01-2017PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of service (out-of-bounds heap read) by crafting a string to the icalparser_parse_string function.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.17%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
Increase +0.12 pp
From 3.04% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Libical_project1 product
- libical0.47 | 1.0
Ubuntu1 product
- libicalAll versions (No fix recorded)
2 vendors · 2 products