How severe is CVE-2015-1269?

CVE-2015-1269 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-1269 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-1269?

CVE-2015-1269 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-1269?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-1269 published?

CVE-2015-1269 was published on 2015-06-26 and last updated on 2026-06-17.

CVE-2015-1269

CVE-2015-1269 is a medium-severity vulnerability in Google Chrome with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-254.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-254
Affected product: Google Chrome
Published: 2015-06-26
Last modified: 2026-06-17

Description

The DecodeHSTSPreloadRaw function in net/http/transport_security_state.cc in Google Chrome before 43.0.2357.130 does not properly canonicalize DNS hostnames before making comparisons to HSTS or HPKP preload entries, which allows remote attackers to bypass intended access restrictions via a string that (1) ends in a . (dot) character or (2) is not entirely lowercase.

Frequently asked questions

What is CVE-2015-1269?: The DecodeHSTSPreloadRaw function in net/http/transport_security_state.cc in Google Chrome before 43.0.2357.130 does not properly canonicalize DNS hostnames before making comparisons to HSTS or HPKP preload entries, which allows remote attackers to bypass intended access restrictions via a string that (1) ends in a . (dot) character or (2) is not entirely lowercase.
How severe is CVE-2015-1269?: CVE-2015-1269 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-1269 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-1269?: CVE-2015-1269 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-1269?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-1269 published?: CVE-2015-1269 was published on 2015-06-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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