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CVE-2026-27205VulnerabilityPublished Updated

SUSE flask · Security update for python-Flask

Affects SUSE flaskSource GCVE Database

0
Authoritative record:CVE-2026-27205· Low 2.3

Not known to be exploited · CVSS 2.3 Low · fixed in SUSE package updates : update SUSE flask when convenient.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 4.0 base score
2.3Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.1.1, 2.43.3_1, 5.1.2_4
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 26 Oct 2026.

What to do

Upgrade flask to 3.1.1; locust to 2.43.3_1; recon-ng to 5.1.2_4.

Affected software

ProductAffectedFixed in
PyPIflaskpkg:pypi/flaskOther threatsAffected
  • <3.1.1
Fixed in
  • 3.1.1
Homebrewlocustpkg:brew/locustOther threatsAffected
  • >=2.2.1 <2.43.3_1
Fixed in
  • 2.43.3_1
Homebrewrecon-ngpkg:brew/recon-ngOther threatsAffected
  • >=4.9.2 <5.1.2_4
Fixed in
  • 5.1.2_4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for python-Flask fixes the following issue: - CVE-2026-27205: information disclosure due to Flask session not adding the `Vary: Cookie` header (bsc#1258700).

References

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