7.5

CVE-2026-44378: botan_project botan Inefficient Algorithmic Complexity

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-44378DEBIAN-CVE-2026-44378openSUSE-SU-2026:11649-1
Published 27-05-2026Last modified 27-05-2026
Open JSON

Vulnerability summary

CVE-2026-44378 is a high (CVSS 7.5) Inefficient Algorithmic Complexity vulnerability in botan_project botan. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.46%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 27-05-2026
    Last modifiedVulnerability information updated.

Description

Botan is a C++ cryptography library. Prior to 3.12.0, certain patterns of indefinite length encodings in BER data could cause quadratic behavior in the parser, resulting in a denial of service. Such BER encodings were accepted even in structures which are required to be encoded as DER, which prohibits indefinite length encodings. This vulnerability is fixed in 3.12.0.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.14 pp

From 0.32% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Botan_project1 product
Debian1 product
  • botan3< 3.12.0+dfsg-2~deb13u1 | < 3.12.0+dfsg-2
Opensuse1 product
  • Botan&distro=openSUSE Tumbleweed< 3.13.0-1.1
Randombit1 product
Ubuntu1 product
  • botan3All versions (No fix recorded)

5 vendors · 5 products

References

5 links